Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? Depolarization has to do with surfaces becoming more negative or positive and reaches a certain point called a threshold. When the threshold is reached‚ an action potential is initiated. 2. What was the threshold voltage in Activity 1? The threshold voltage in Activity 1 was 3.0. 3. What was the effect of increasing the voltage? How does this change correlate to changes
Premium Action potential Neuron Sodium
Exercise 3: Neurophysiology of Nerve Impulses Worksheet Eliciting a Nerve Impulse Activity 1: Electrical Stimulation 1. Do you see any kind of response on the oscilloscope screen? No there was no response‚ the line was flat 2. What was the threshold voltage‚ or the voltage at which you first saw an action potential? 3.0V 3. How does this tracing compare to the one that was generated at the threshold voltage? At 3.5V the high & low peaks were just slightly above and below respectively
Premium Nervous system Neuron Brain
Cells come from pre-existing cells via division Cells of all organisms fundamentally similar in structure‚ function‚ and metabolic functions Contain hereditary information passed down during cell division A cell’s volume increases faster than it’s surface area Less surface area = less are for nutrient/waste diffusion Solves via: Dividing‚ getting thinner‚ form microvilli‚ store nutrients (Microvilli – within small intestine) Cells are highly organized‚ 3 basic parts Plasma membrane Selective
Premium Immune system
REVIEW SHEET EXERCISE 3 Neurophysiology of Nerve Impulses NAME: LAB TIME/DATE: Eliciting (Generating) a Nerve Impulse 1. Why don’t the terms depolarization and action potential mean the same thing? Action potential is a quick depolarization followed by a repolarization. Depolarization is a one way trip. It also takes a substantial depolarization to cause an action potential. 2. What was the threshold voltage in Activity 1? 3.0 V 3. What was the effect of increasing the voltage?
Free Action potential Axon Nerve
blood to the heart? Coronary veins return blood to the right atrium through what? The conduction system is also know as the __________________ circuit. List the 4 main components of the Conduction system‚ in order: Which of thse is known for being the pacemaker of the heart‚ initiates the eletrical impulse‚ stimulates contraction of the atrium‚ sends signal to the AV Node‚ generates 60-100 impulses/minute‚ and seen on ECG as P wave? * Atrioventricular Node (AV Node) * Bundle of HIS
Premium Heart
Christians believe that God should punish people or get angry with them because God’s every judgment is just since he is the perfect judge‚ he is the perfect judge because he is omniscient‚ omnipotent and morally perfect which means he cannot be racist‚ biased‚ corruptible‚ ignorant‚ sexist or any other factors that make a judge ‘bad’. God’s punishment for us is to send us to hell‚ it is a place of punishment and imprisonment for those who deserve it‚ hell is everlasting and Christians believe that
Premium Justice God Bible
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 experience
Premium Nervous system Action potential Axon
The Action Potential An action potential‚ also called a spike‚ nerve impulse‚ and discharge‚ is the rapid reversal of charge of the cell membrane. These changes in charge occur within milliseconds‚ meaning the action potential travels very quickly down the axon in order to convey information over long distances. This transfer of information occurs within six phases and requires the presence of multiple pumps and channels embedded in the membrane to control ion concentration. Phase 1: The Resting
Premium Action potential
to those electrodes so that a computer can record and evaluate the consequent nerve impulse for velocity‚ onset and amplitude. Neuropathies are caused by damage to the nerves axon and/or damage to the myelin sheath surrounding the nerve. If a response is slower than normal‚ damage to the myelin sheath is implied. If the height of the response’s amplitude is low with a relatively normal speed of conduction‚ damage to the nerve axon is implied. How will the test feel? • There is generally
Premium Nervous system Action potential Axon
signals are “jumping” due to the process called saltatorary conduction. An area of which myelinated axons are unmyelinated is labeled as the nodes of ranvier. Considering myelin act as an insulator‚ myelinated fibers aren’t capable to conduct impulses. Therefore along myelinated axons‚ action potentials can only take place on the nodes and thus‚ making it “jump” from nodes to nodes. By forcing the electric charge to “jump”‚ the conduction on myelinated axons moves faster than those axons that are
Premium Neuron Nervous system Brain