Positive feedback - The response enhances the original stimulus so that the response is accelerated Chapter 2 Chemistry comes Alive Matter: anything that takes up space and mass Energy: capacity to do work or put matter into motion Potential (stored energy) Kinetic ( active and working energy) Elements: substances that cannot be decomposed into smaller substances Atoms: made of protons‚ neutrons and electrons
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occur. At the start my lab partner was calm resulting in the blood pressure to be around 125/59 with 55 beats per minute. The second time we did it‚ the numbers were fairly similar 126/59 and 62 beats per minute. At the beginning there is no action potential occurring or the pacemaker is not racing to make the heart beat quicker because the body is not using much energy since it is basically at a resting state. You can detect the heart beats by using the QRS EKG method where each one can represent
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Computer Simulation of Membrane Potential Measurements INTRODUCTION “MEMPOT”© is an interactive graphical simulation program that is designed to show how cell membrane potentials are measured with microelectrodes in the laboratory situation. The simulation shows how the membrane potential depends on the external potassium‚ [K+]o and external sodium‚ [Na+]o concentrations and the relative permeability of the membrane to these ions. The program simulates membrane potential measurements in any excitable
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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 everything
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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- Exponential
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Information * The Neuron at Rest: A Tiny Battery * The resting potential of a neuron is its stable‚ negative charge when the cell is inactive. * The Action Potential * An action potential is a very brief shift in a neuron’s electrical charge that travels along an axon. * The absolute refractory period is the minimum length of time after an action potential during which another action potential cannot begin. * The All-or-None Law * The neural impulse
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CHAPTER 2: THE BIOLOGY OF MIND CHAPTER OBJECTIVES 1. Explain why psychologists are concerned with human biology. 2. Describe the structure of a neuron‚ and explain how neural impulses are generated. 3. Describe how nerve cells communicate‚ and discuss the impact of neurotransmitters and drugs on human behavior. 4. Identify the major divisions of the nervous system and describe their functions‚ noting the three types of neurons that transmit information through the system
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What is psychology? The scientific study of behavior and mental processes Development of psychology as a science Wilhelm Wundt founded the first psychology laboratory. Student of Wudnt ’s‚ E.B. Titchner named Wundt ’s approach structuralism. William James gave field an "American Stamp‚" invented functionalism Contemporary approaches to psychology Biological Approach (focus on the body) Neuroscience Behavioral Approach (behavioral responses and their environmental determinants) Psychodynamic
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SBI4U - Practice Exam Part A: Multiple Choice 1. When organic molecules are joined together and a water molecule is removed‚ the reaction is called which of the following? A. Dehydration synthesis. B. Hydrogenation. C. Hydrolysis. D. Oxidation. What is a nucleotide composed of? A. Nitrogenous base‚ 6 carbon sugar and a phosphate group. B. Nitrogenous base‚ 5 carbon sugar and a phosphorus group. C. Nitrogenous base‚ 5 carbon sugar and a phosphate group. D. None of the above. Enzymes work as catalysts
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nervous system cause muscles to contract. Both neurons and muscle tissue conduct electrical current by moving ions across cellular membranes. A motor neuron ends in a synapse with a muscle fiber. The neuron releases acetylcholine and transfers the action potential to the muscle tissue. The signal will travel through the tissue and trigger the contraction of individual sarcomeres. One synapse generally controls an entire muscle fiber. One motor neuron usually controls several adjacent muscle fibers. A group
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