Action potential Essays & Research Papers

Best Action potential Essays

  • Action Potentials - 408 Words
     Action Potentials An action potential is the change in electrical potential associated with the passage of an impulse along the membrane of a muscle cell or nerve cell. An action potential occurs when a neuron sends information down an axon, away from the cell body. A threshold is the minimum amount of stimulation needed to start a neural impulse (you know, the electrical impulses that travel throughout your body carrying important information). Action potentials...
    408 Words | 2 Pages
  • action potential - 1527 Words
    The formation of an action potential can be divided into five steps. (1) A stimulus from a sensory cell or another neuron causes the target cell to depolarize toward the threshold potential. (2) If the threshold of excitation is reached, all Na+ channels open and the membrane depolarizes. (3) At the peak action potential, K+ channels open and K+ begins to leave the cell. At the same time, Na+ channels close. (4) The membrane becomes hyperpolarized as K+ ions continue to leave the cell....
    1,527 Words | 4 Pages
  • Action potential - 631 Words
    Describe the ionic events underlying the nerve action potential The ionic events consists of four main stages which are resting potential, repolarization, depolarization and hyperpolarization. The resting potential is due to the sodium potassium pump where 3 Na+ ion move outside the membrane and 2 K+ ion move into the cell ( and this causes the negative potential inside the cell membrane. Besides that, the potassium sodium “leak channel” which is more permeable to K+ than Na+ also lead to...
    631 Words | 2 Pages
  • Comparison - Graded Potentials to Action Potentials
    A graded potential in physiology, is described as local changes in membrane potential that occur in varying grades or degrees of magnitude or strength. When compared to graded potential, an action potential is described as brief, rapid, large (100mV) changes in membrane potential during which the potential actually reverses so that the inside of the excitable cell transiently becomes more positive than the outside. As with a graded potential, an action potential involves only a small portion of...
    911 Words | 3 Pages
  • All Action potential Essays

  • Neuro Action Potential - 2553 Words
    Neuro notes for test 2! Cell membranes are composed of a lipid bilayer. It has different receptors that allow different ions to pass, depending on the conditions in the cell. Leak channels- always open allow ions to flow back and fourth across the cell membrane Na cl ,K and Ca ions and they just flow back and fourth without any gate keeper or obstruction, When the neuron is at rest its cytoplasm is Negatively charged. That means that it is not going under depolarization, we use the term...
    2,553 Words | 8 Pages
  • Action Potential 2 - 2127 Words
    The Action Potential Graphics are used with permission of: Pearson Education Inc., publishing as Benjamin Cummings (http://www.aw-bc.com) ** If this is not printed in color, it is suggested you color code the ion channels and ions as you go through this topic. Ions channels and ions should be color coded as follows: Red: Sodium ion channels and sodium ions Blue: Potassium ion channels and potassium ions Page 1. Introduction • Neurons communicate over...
    2,127 Words | 10 Pages
  • An Action Potential in a Neuron - 2501 Words
    This essay will describe the electrochemical processes that allow an Action potential to occur in a neuron. This will be achieved by firstly, defining the purpose of neurons in the body along with a description of the components within a neuron and how they enable information to be passed through the cell membrane and on to other neurons. Secondly, the resting potential of a neuron will be explored with relation to the concept of selective permeability and the purpose of the Sodium -...
    2,501 Words | 7 Pages
  • Compound Action Potentials - 1907 Words
    Yentl Smith BIOL 3810-504 Compound Action Potentials Date Performed: 15FEB2011 Date Due: 01MAR2011 Introduction Neurons are the cells that receive and transmit electrical signals (University of North Texas, 2010). The ability of the neuron to conduct these impulses is because of an electrochemical voltage across the plasma membrane of that neuron. An action potential is an all or nothing response to a stimulus along a single axon. A compound action potential is a graded response...
    1,907 Words | 8 Pages
  • Action Potential and Correct Answer
    Name:shasou Exercise 3: Neurophysiology of Nerve Impulses: Activity 5: The Action Potential: Measuring Its Absolute and Relative Refractory Periods Lab Report Pre-lab Quiz Results You scored 50% by answering 2 out of 4 questions correctly. 1. Which of the following occurs after the peak of the action potential? Your answer : b. Voltage-gated K+ channels open. Correct answer: d. All of these occur. 2. What is meant by Na+ channel inactivation? Your answer : a. The Na+ channel opens when the...
    677 Words | 3 Pages
  • Action Potential and Ion Channels
    The Nervous System: Ion Channels 1. What structures in the cell membrane function as ion channels? Intergral Proteins 2. Ion channels are selective for specific ions. What three characteristics of the ions are important for this selectivity? a. Charge on ion (+ or -) b.Size c. The amount of water the Ion attracts 3. Channels can be classified as either gated or nongated channels. A sodium channel that is always open would be classified as a/an non-gated channel. 4....
    317 Words | 2 Pages
  • What is an action potential
    What is an action potential? To put it simply, it is a message that is sent down the nervous line. The message is written and is sent from the central nervous system. That message is addressed to muscles or glands. This essay will explain what happens before, during, and after an interneuron action potential. To accurately define an action potential, it is part of the incredible course of events that occur during the firing of a neuron. When a neuron is not firing signals, the interior of the...
    626 Words | 2 Pages
  • Action Potential Essay - 665 Words
    RESTING POTENTIAL Resting potential is the membrane potential when a neuron is not conducting any electrical impulse or signal. The resting potential is around -75 mV. During resting potential, the inside of the axon is negative GRADED POTENTIAL ACTION POTENTIAL Action potential is a fleeting reversal of the membrane potential, caused by changes in permeability of the plasma membrane of neuron to potassium and sodium ions causing an electrical impulse to be transmitted along the axon....
    665 Words | 3 Pages
  • Action Potential and Receptor Olfactory Receptor
    Exercise 3: Neurophysiology of Nerve Impulses: Activity 2: Receptor Potential Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Assuming that the resting potential of a sensory neuron is -70 mV, which of the following represents a depolarization? You correctly answered: c. a change to -60 mV 2. Which of the following is a sensory modality (type of sense)? You correctly answered: e. all of the above 3. Which of the following is a sensory...
    938 Words | 11 Pages
  • nervous system membrane action potential
    Muscles and glands Neurons communicate with other neurons and stimulate both ___ and ___.  Synapses, cell bodies, dendrites Signals from other neurons are received at junctions called ___, located primarily on the ___ ___and ___, the receptive and integrative regions of the neuron.  Axon hillock, action potential The area where the axon emerges from the soma (cell body) is called the ___ ___. This is also where the outgoing signal, called a/an ___ ___ is generated.  Collaterals,...
    333 Words | 2 Pages
  • Nervous System I Action Potential
    1. a. The action potential changes the membrane potential from -70 mV (resting) to +30 mV and back again to the resting membrane potential. b. This results from a change in membrane permeability first to Na then to K due to the opening of what type of ion channels? Voltage gated channels 2. a. Where is the density of voltage-gated Na+ channels the greatest? Axon hillock b. What areas of the neuron generate signals that open these voltage-gated channels? Dendrites and the cell body c....
    343 Words | 2 Pages
  • Ionic Mechanism + Propagation of Action Potentials
    The Ionic mechanism and propagation of action potentials. The action potential is the result of a large, sudden increase in sodium permeability of the membrane. The resulting rush of sodium ions into the membrane and accumulation of positive charge on its inner surface drives the potential towards Ena. This is followed by repolarisation, whereby there is a large increase in the membranes permeability to potassium ions, hence the membrane returns to Ek. Explanation of the (ionic) mechanisms...
    1,569 Words | 5 Pages
  • Biology: Action Potential and Spinal Cord
    ckingmotherCoordination by Neural Signaling 26.1 Invertebrates reflect an evolutionary trend toward bilateral symmetry and cephalization * Invertebrate Nervous Organization * In simple animals, such as sponges, the most common observable response is closure of the osculum (central opening) * Hydras (cnidarians) have a nerve net that is composed of neurons * Planarians, (flatworms) have a ladderlike nervous system * In annelids (earthworm), arthropods (crab),...
    2,528 Words | 9 Pages
  • The Action Potential: Importance of Voltage-Gated Na+ Channels
    Name: Christina Hale Exercise 3: Neurophysiology of Nerve Impulses: Activity 4: The Action Potential: Importance of Voltage-Gated Na+ channels Lab Report Pre-lab Quiz Results You have not completed the Pre-lab Quiz. 02/28/15 page 1 Experiment Results You have not completed the Experiment. Experiment Data: 02/28/15 page 2 Post-lab Quiz Results You have not completed the Post-lab Quiz. 02/28/15 page 3 Review Sheet Results 1. What does TTX do to voltage-gated Na+ channels? Your answer:...
    433 Words | 2 Pages
  • Measurement of Compound Action Potentials from the Frog Sciatic Nerve
    Abstract: The purpose of this experiment was to examine how the compound action potentials propagate down the sciatic nerve of a frog based on varying stimuli. Before the nerve could be tested it needed to be extracted from the thigh of the frog and then submerged in saline. Several varying stimuli were used and recorded by a software package. The second experiment requires a constant stimulus with varying reference pin locations. From this the velocity of the action potential propagated can be...
    1,405 Words | 4 Pages
  • Membrane potential - 918 Words
    BIOSC 048: Problem Set Questions 1. Given that cell A has significantly more nongated K+ channels than cell B, which cell has the larger resting membrane potential? Explain. If the permeability to K is higher in A than in B, then the resting membrane potential (rmp) will be closer to the equilibrium potential in cell A, which means the rmp will be more negative in cell A than in cell B; or in other words, the potential difference will be LARGER in cell A. 2. Predict the effect of a...
    918 Words | 3 Pages
  • The Nervous System: Membrane Potential
    The Nervous System: Membrane Potential 1. Record the intracellular and extracellular concentrations of the following ions (mM/L): Intracellular Extracellular Sodium (Na+) Potassium (K+) Chloride (Cl–) 2. Excitable cells, like neurons, are more permeable to ___________ than to ___________. 3. How would the following alterations affect the membrane permeability to K+? Use arrows to indicate the change in permeability. a. An increase in the number of passive K+ channels...
    267 Words | 3 Pages
  • Pp Lab Report Potentials
    LABORATORY REPORT Activity: Action Potentials Name: Caitlin Magnacca Instructor: Date: 03.19.2015 Predictions Exceeding threshold depolarization at the trigger zone______the likelihood of generation of an action potential. increases Action potential amplitude decreases with distance Increasing frequency of stimulation to the trigger zone increases number of action potentials Materials and Methods Experiment 1: Effect of Stimulus Strength on Action Potential Generation Dependent Variable...
    772 Words | 8 Pages
  • Resting Membrane Potentials - 351 Words
    Resting membrane potentials Definition: Large nerve fibers when not transmitting nerve signals is about 90 millivolt. That is, the potential inside the fiber is 90 millivolts more negative than the potential in the extracellular fluid on the outside of the fiber. The Na+-k+ pump also causes large concentration gradients for sodium and potassium across the resting nerve membrane. These gradients are the following: Sodium ( outside): 142 mEq/L Sodium ( inside): 14 mEq/L Potassium (...
    351 Words | 2 Pages
  • Suboxone: Neuron and Post-synaptic Potentials
    Suboxone Biological Psychology Suboxone | Addiction psychology has made a great impact on the field of biological psychology, especially when it comes to subjects such as | |psycho-pharmacology. The abuse of prescription pain medicine has risen to an estimated 9 million in America alone who take the medication for | |non-medical reasons. The psychology field has had a new revolution in addiction control called Suboxone. In order for psychiatric doctors or...
    769 Words | 3 Pages
  • Determine the Effect and Site of Action of Strychnine
    Objective: To define a method to “Determine the effect and site of action of strychnine”. Requirements: Apparatus: * Beakers. * Syringe. * Mask. * Gloves. Subject: * Healthy Frog. Scope: Strychnine is highly toxic,colorless,crystalline alkaloid cause killing of small vertebrates e.g, dogs,rodents because its site of action is spinal cord. Symptoms of severity: Severe nausea and vomiting ,convulsions of...
    423 Words | 2 Pages
  • Nervous System: Course Notes
    1. Explain both the anatomical and functional divisions of the nervous system. Include the subdivisions of each. The nervous system’s function is to monitor stimuli occurring inside and outside the body, process and interpret this sensory input, and respond by activating effector organs. It consists of the Central Nervous System (brain and spinal cord), and the Peripheral Nervous System (neurons that carry messages to and from the CNS). 2. Describe the composition and function of the...
    326 Words | 1 Page
  • Animal Behavior - 5919 Words
    I. Definition of Animal Behavior: Any observable thing an animal does a. Covers broad range of activities from involuntary muscle movements to animal intelligence an social behavior b. Why? i. Exploit animals more efficiently 1. Want to domesticate animals 2. Use as food ii. Protect and conserve animals better iii. Academic reasons c. What kinds of questions? iv. Mechanistic: how? v. Evolutionary:...
    5,919 Words | 24 Pages
  • Psy 387 Study Guide First Exam
    The Major Issues- Chapter 1 Module 1.1 1. The Mind-Brain Relationship a. Biological Psychology is the study of physiological evolutionary and developmental mechanism of behavior and experience. b. At the microscopic level, we find two kinds of cells: the neurons and the glia i. Neurons send messages to each other and also to muscles and glands. They have changing sizes, shape and functions. ii. Glia- which are most of the time smaller than neurons have many...
    3,216 Words | 11 Pages
  • Physioex 8.0 Exercise 3
    Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? NO 2. What was the threshold voltage, or the voltage at which you first saw an action potential? 3.0 V 3. How does this tracing compare to the one that was generated at the threshold voltage? The tracing travel in the same fashion but the tracing were different with an increase threshold voltage 4. What reason can you give for the change? Increase voltage 5. Record this maximal voltage here:...
    654 Words | 3 Pages
  • Muscle Contraction - 262 Words
    Viany Reyes November 08, 2011 Dr. Dunaway Neuronal signaling in muscle contraction is triggered when an action potential reaches the neuromuscular junction. At this junction, acetylcholine (ACh) is the main neurotransmitter. Packaged in vesicles, ACh fuses with the neuron’s membrane and is released into the synaptic cleft. ACh diffuses toward the motor end plate and bind to the neurotransmitter receptor on it. The muscle fiber is then triggered to produce an action potential of its...
    262 Words | 1 Page
  • Unit nine - 1541 Words
    Name___ Unit 9 Worksheet – Membrane Potentials Each answer is worth 1 point (20 points total) To complete this worksheet, select: Chapter 12: Nervous Tissue Animations Introduction to Membrane Potentials 1. Describe the neuron function. Neurons act to facilitate the transfer of data amongst the body’s cells sustaining homeostasis 2. Contrast graded potentials and action potentials. Graded potentials are electrical signals that have variable amplitude,...
    1,541 Words | 6 Pages
  • Human Physiology - 524 Words
    REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses NAME: 1. Match each of the definitions in Column A with the appropriate term in Column B. Column A Column B __D__ term that refers to a membrane potential of about -70 mv __F__ reversal of membrane potential due to influx of sodium ions __B__ major cation found outside of a cell __A__ minimal stimulus needed to elicit an action potential __E__ period when cell membrane is totally insensitive to additional stimuli,...
    524 Words | 3 Pages
  • Welcome Speech, Question Paper,
    V SALAI SELVAM, AP & HOD, ECE, Sriram Engg. College, Perumalpattu EC1006 MEDICAL ELECTRONICS 3 0 0 100 AIM To make students to understand the applications of electronics in diagnostic and therapeutic area. OBJECTIVE • To study the methods of recording various biopotentials • To study how to measure biochemical and various physiological information • To understand the working of units which will help to restore normal functioning • To understand the use of radiation for diagnostic and therapy...
    2,701 Words | 12 Pages
  • Experiment of Zoology - 703 Words
    3. Why don’t the terms depolarization and action potential mean the same thing? The terms depolarization and action potential differ because are excitable cells that communicate by transmitting electrical impulses that are capable of producing rapid electrical signals and depolarization in the interior surface of the membrane which becomes less negative and the exterior surface becomes less positive. Additionally, when depolarization reaches a certain threshold, an action potential is...
    703 Words | 3 Pages
  • Lab Report- Neurophysiology of Nerve Impulses
    Introduction Neurons (also known as neurons, nerve cells and nerve fibers) are electrically excitable and the most important cells in the nervous system that functions to process and transmit information. Neurons have a large number of extensions called dendrites. They often look likes branches or spikes extending out from the cell body. It is primarily the surfaces of the dendrites that receive chemical messages from other neurons. One extension is different from all the others, and is...
    1,755 Words | 6 Pages
  • Physioex Unit 1 Flash Cards
    PhysioEx Lab Unit 1 Print Options This box will be automatically hidden when printing. ← Back to Set Page Alphabetize terms Flip terms and definitions 2hr OGTT level aboe 200mg/dl: confirms diabetes dx 2hr. OGTT level b/w 140-200mg/dl: impaired glucose tolerance absolute refractory period: period when cell membrane is totally insensitive to additional stimuli, regardless of the stimulus force applied. ACTH: hormone released by the anterior pituitary. stimulated by a hypothalamic...
    2,057 Words | 6 Pages
  • Nervous System I: Ion Channels
    Nervous System I: Ion Channels 1. What structures in the cell membrane function as ion channels? Integral Proteins 2. Ion channels are selective for specific ions. What three characteristics of the ions are important for this selectivity? 1. Charge 2. Size 3. Amount of water the ion attracts 3. Channels can be classified as either gated or nongated channels. A sodium channel that is always open would be classified as a/an __________nongated______________ channel. 4. Would sodium...
    279 Words | 0 Page
  • Psy midterm paper - 1438 Words
    Midterm Essay ExaminationMidterm Essay Examination1.Describe the basic functioning of a neuron beginning with receiving signals from other neurons or sense organs and ending with the transmission of a signal to another neuron. Explain how a pattern of neuron firing is related to behavior. Neurons are information- processing units in the central nervous system that receive and transmit information. It is made up of an axon, dendrites and a cell body. The nucleus and cytoplasm are contained in...
    1,438 Words | 5 Pages
  • Unit 5 Biology Aqa
    Unit 5 Biology notes Contents Section 9.1 – Sensory Reception 3 Section 9.2 – Nervous Control 4 Section 9.3 – Control of heart rate 5 Section 9.4 – Role of receptors 6 Section 10.1 – Coordination 8 Section 10.2 – Neurons 10 Section 10.3 – The nerve impulse 11 Section 10.5 – The speed of a nerve impulse 12 Section 10.6/10.7 – Structure and function of the synapse / Transmission across...
    11,564 Words | 47 Pages
  • Crayfish Lab Report - 1499 Words
    A. Avril Crayfish Lab Report November 9, 2012 Dr. Marvin Results: Figure 1. Firing Rate of Tonic Receptor in Response to Stretch. The correlation between Firing Rate and Stretch of the slow adapting crayfish receptor for four different sets of data is represented in this figure. The recordings are taken at stretches of 2, 4, 6, 8, and 10 mm of the crayfish tail. The best fit lines for the different sets of data are as follows: Ali and Emily- Linear best fit line, Dave and Laura-...
    1,499 Words | 5 Pages
  • The Nervous System: Neurophysiology of Nerve Impulses
    Session 9: The Nervous System - Assignment #2 PhysioEx Assignment :
Exercise 3 Neurophysiology of Nerve Impulses Activity 1: The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Increasing the extracellular K+ causes the membrane potential to change to a less negative value because when K+ ions diffuse out across the membrane they are leaving behind a net negative charge. 2....
    2,320 Words | 10 Pages
  • Nervous System Study Guide
    Name________Amanda Fox BIO 23500-60________ BIO 235 Chapter 10 –Nervous System I 1) Define the following word parts. Ax-, axle: axon – cylindrical nerve process that carries impulses away from a neuron cell body. Dendr-, tree: dendrite – branched nerve process that serves as the receptor surface of a neuron. Funi-, cord, rope: funilicus – funiculi of spinal cord or bundle of nerve fibers. Gangli-, knot: ganglia – deliver information to the body -lemm, rind or peel: neurilemma –...
    1,965 Words | 7 Pages
  • Sample Physiology MCQs - 986 Words
    Sample Physiology MCQs 1. Compound action potentials can be graded responses. True 2. The sciatic nerve contains axons of both afferent and efferent neurones. True 3. The absolute refractory period of an action potential is the period after an initial stimulus when it is impossible to evoke another action potential with a second stimulus. True 4. The refractory periods of individual axons are important as they dictate the maximal action potential firing rate of a neuron. True 5. Compound...
    986 Words | 3 Pages
  • The Nervous System II: Ion Channels
    The Nervous System II: Ion Channels 1. List four neurotransmitters that bind to ion channels, these neurotransmitters are called __directly____-acting neurotransmitters. a. ACh b. glutamate c. GABA d. Glycine 2. a. The binding of ACh opens ion channels in the dendrites or cell body that permits both _sodium______ and _potassium____ to move through them. b. Which ion would move into the cell? _sodium____out of the cell? _potassium_____________ c. Which ion has the greatest...
    278 Words | 2 Pages
  • Physioex 3 - 1187 Words
    Neurophysiology of Nerve Impulses ACTIVITY 1 The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. If the extracellular K+ increases then the concentration of intracellular K+ will decrease causing a decrease in the steepness of the concentration gradient and fewer K+ ions would be drawn out. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less...
    1,187 Words | 5 Pages
  • Unit 9 Assignment SC121
    LABORATORY REPORT Activity: Action Potentials Name: Barbara Uthe Instructor: Catherine Rice Date: 08.17.2014 Predictions Exceeding threshold depolarization at the trigger zone______the likelihood of generation of an action potential. increases Action potential amplitude increases with distance Increasing frequency of stimulation to the trigger zone decreases number of action potentials Materials and Methods Experiment 1: Effect of Stimulus Strength on Action...
    907 Words | 9 Pages
  • Signal Travelling in Neurons - 1298 Words
    Signals Traveling in Neurons Two opposing ideas about the nervous system * Reticular theory ( the nervous system consisted of a large network of fused nerve cells) * Neuron theory ( the nervous system consisted of distinct elements or cells * Discovery of staining led to the acceptance of neuron theory. Staining is a chemical technique that caused nerve cells to become colored so they stood out from surrounding tissue * A way of electricity is transmitted in groups of neurons,...
    1,298 Words | 5 Pages
  • Kcl Injection, Hyperkalemia - 405 Words
    1) a. When KCl is injected into the bloodstream of the patient, the K+ gradient across the membrane is reduced. This results in depolarization where cells generate an action potential. Voltage-gated Na+ channels open in response to depolarization and close by inactivation for a refractory period and remain closed until repolarization. In this new setting, less K+ leaks out of the intracellular space and the cell is unable to return to its resting membrane potential (ie. The cell stays slightly...
    405 Words | 2 Pages
  • NeuroPhsioEX 3 - 592 Words
    Neurophysiology Lab Report Activity 1: 1. What was your observed threshold voltage? The voltage at which I first observed an action potential was 3.0V 2. How does this tracing compare to the one that was generated at threshold voltage? The small increase in voltage causes a small increase in the height of the action potential peak. 3. What reasons can you give for your answer? Recruitment of the nerve’s neurons. Increasing the voltage will cause most of the neural fibers to...
    592 Words | 3 Pages
  • Physioex 8.0 Lab Exercise #3
    Exercise 3: Neurophysiology of Nerve Impulses Worksheet Assignment Due: Week 4 Student instructions: Follow the step-by-step instructions for this exercise found in your text and record your answers in the spaces below. Submit this completed document by the assignment due date found in the Syllabus. Please make sure that your answers are typed in RED. Please type your Name and Student ID Number here: Charles Coon 4048223 Eliciting a Nerve Impulse Activity 1: Electrical...
    822 Words | 3 Pages
  • lab analysis - 436 Words
    Lab Analysis Questions 1. What are the important ions for most neurons when considering changes in membrane potential? (3 points) 2. What is the resting membrane potential? (3 points) 3. What does it mean that the voltage just inside the membrane is negative? (4 points) Neurophysiology of Nerve Impulses Activity 2: Receptor Potential (20 points total) Notes: • After reading the Overview and Introduction, Click on Experiment. • Follow the directions on the left side of...
    436 Words | 3 Pages
  • Cardiac - 754 Words
    http://www.docstoc.com/docs/72619817/Bad-Fish-Part-answers-BioAP-home Diaphoresis: Excessive sweating, to an uncommon degree, as a symptom of disease or a side effect of a drug. Motor dysfunction: abnormality of the motor system. Paresthesia: abnormal skin sensation that may have no specific cause, such as tickling, tingling, burning, pricking, or numbness of a person's skin with. Cyanotic: A bluish discoloration of the skin and mucous membranes resulting from insufficient oxygenation of the...
    754 Words | 3 Pages
  • The Nervous System Ii: Anatomy Review
    BIO 1012 Anatomy and Physiology Lab The Nervous System II: Anatomy Review 1. The somatic nervous system stimulates __Smooth__ muscle. The autonomic nervous system stimulates _Skeletal___ muscle, __Cardiac___ muscle, and _Glands___. 2. The autonomic nervous system (ANS) consists two divisions, each innervating the effector organs. The sympathetic nervous system (SNS) generally speeds up everything except digestion. The parasympathetic nervous system (PNS) generally slows down...
    1,270 Words | 6 Pages
  • Twitch Muscle Fibers - 2237 Words
    muscle contraction Introduction For a skeletal muscle fiber to contract, a stimulus must be applied to it. The stimulus is delivered by a nerve cell, or neuron. A neuron has a threadlike process called and axon that my run 91 cm or more to a muscle. A bundle of such fibers from man different neurons composes a nerve. A neuron that stimulates muscle tissue is called a motor neuron. The motor neuron branches into terminal structures called telodendria that come into close approximation...
    2,237 Words | 7 Pages
  • Neurophysiology of Nerve Impulses - 1839 Words
    EXERCISE 3: Neurophysiology of Nerve Impulses |ACTIVITY 1: The Resting Membrane Potential |Answers | |The nervous system contains two general types of cells: neuroglia cells and |C- Neurons | |nerves. |...
    1,839 Words | 11 Pages
  • Drugs & Behavior Exam Study Guide
    Drugs & Behavior EXAM I Study Guide Every correct answer is on the test…MC & Matching terms with definitions. No short answers… Terms: Psychopharmacology study of the action of drugs on living organisms Specific Drug Effects: result from physical and biochemical interactions of a drug with its target tissue Therapeutic effects- desirable effects of drug-receptor binding Side effects- undesirable effects of drug-receptor binding Non-specific Drug Effects: effects of a drug not based...
    3,140 Words | 12 Pages
  • Bile for tomato - 893 Words
    SIBULO, MONIQUE STACY JANE B. 2012-1-1433 17 SEPTEMBER 2013 1. The function of a neuron is to convey or process signals. Discuss how the specific parts of a neuron allow this general function to occur. Neurons has four distinct zones that has each of their specialization in the transmission of signals across the body. The first zone is for signal reception, it consists the dendrites and the cell body. The dendrites receive the signals and be converted into electrical signals that will...
    893 Words | 3 Pages
  • physioex9.0 ex. 3 activity 8
    Exercise 3: Neurophysiology of Nerve Impulses: Activity 8: Chemical Synaptic Transmission and Neurotransmitter Release Lab Report Pre-lab Quiz Results You scored 100% by answering 5 out of 5 questions correctly. 1. The end of the axon where it contacts a target is called the You correctly answered: c. axon terminal. 2. Neurotransmitter is released into the synaptic gap by You correctly answered: a. exocytosis. 3. Exocytosis of neurotransmitter from the axon terminal is triggered by an...
    604 Words | 2 Pages
  • BIOS252 Week 3 PowerPhys4 Lab Report 2
    LABORATORY REPORT Activity 4: Generation of Action Potentials Name: Instructor: Date: PREDICTIONS 1. Exceeding the threshold depolarization at the trigger zone DECREASES the likelihood of generation of action potential. 2. Action potential amplitude: DOES NOT CHANGE with distance 3. Increasing frequency of stimulation to the trigger zone: DOES NOT increase the production of action potentials. MATERIALS AND METHODS Experiment 1: Effect of Stimulus Strength on Action Potential...
    973 Words | 5 Pages
  • Physio Ex 9.0 Exercsie 3
    PhysioEx 9.0 Exercise 3 Neurophysiology of Nerve Impulses A C T I V I T Y 1 The Resting Membrane Potential 1. Explain why increasing extracellular K_ reduces the net diffusion of K_ out of the neuron through the K_ leak channels. Increasing the extracellular potassium reduces the concentration gradient, and less potassium diffuses out of the neuron and into the cell. 2. Explain why increasing extracellular K_ causes the membrane potential to change to a less negative value....
    2,144 Words | 9 Pages
  • How a Muscle Contracts - 261 Words
    A motor neuron, a nerve ending that is attached to a muscle fiber in Petzold’s huge bicep, sends a message to contract. This message goes to the neuromuscular junction, which is the connection between the actual nerve fiber and muscle fiber. As the message to contract reaches the terminals a neurotransmitter, a chemical messenger for the body, is released into the gap between the terminal end, and the sarcolemma and motor end plate called the synaptic cleft. The particular neurotransmitter is...
    261 Words | 1 Page
  • Iworx - 8507 Words
    Experiment AN-4: Action Potentials in Earthworms Background In the resting cell, the permeability of the membrane to potassium (P K ) is greater than its permeability to sodium (P Na ). Stimulation, like synaptic activity coming from other nerve cells, can depolarize (make less negative) the cell membrane. Sodium channels in the cell membrane are sensitive to membrane depolarization and they respond by opening, which increases the membrane’s permeability to sodium. If the depolarization...
    8,507 Words | 25 Pages
  • neuromuscular juntion and exocytosis - how botox works
     Exocytosis and Neuromuscular Junction The Underlying Affect of Botox in our System Botulinum neurotoxin A, (BoNT-A), commonly known as Botox, is a type of neurotoxin that targets the neuromuscular junction (Merchand-Pauvert, V., Aymard, C., Giboin, L., Dominici, F., Rossi, A., & Mazzocchino, R. (2012)). The neurotoxin is produced by an anaerobic bacterium of the Clostridium protein that is very...
    549 Words | 2 Pages
  • a&p review questions - 716 Words
    Biology 21300 - Anatomy and Physiology Review Questions Homework Assignment Due on Day of Exam 3 - 2013 – Prior to taking Exam III Students must answer 20 of the questions listed below. All answers must be handwritten and turned in with Students Name, Class, Section Number and Date at the top of the page. 1. What are the three types of muscle tissue and the main differences between them. 2. Explain the sliding filament model of muscle contraction. 3. Define the resting membrane...
    716 Words | 5 Pages
  • Anatomy and Physiology Exam 3
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