BISC 104 - Physio Ex_Exercise 3 Answer Sheet - Neurophysiology of Nerve Impulse

BISC 104 - Physio Ex_Exercise 3 Answer Sheet - Neurophysiology of Nerve Impulse

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REVIEW SHEET e x e r c i s e 3 Neurophysiology of Nerve Impulses Review Sheet 3 17 T h e N e r v e I m p u l s e 1. Match each of the terms in column B with the appropriate definition in column A. Column A Column B 1. term used to denote that a membrane potential is sitting at about ± 70 mV 2. reversal of membrane potential due to influx of sodium ions 3. major cation found outside the cell 4. minimal stimulus needed to elicit an action potential 5. period when cell membrane is totally insensitive to additional stimuli, regardless of the stimulus force used 6. major cation found inside the cell 2. Fill in the blanks with the correct words or terms. Neurons, as with other excitable cells of the body, have two major physiological properties: and . A neuron has a positive charge on the outer surface of the cell membrane due in part to the action of an active transport system called the . This system moves out of the cell and into the cell. The inside of the cell membrane will be negative, not only due to the active transport system but also because of , which remain negative due to intracellular pH and keep the inside of the cell membrane negative. 3. Why don’t the terms depolarization and action potential mean the same thing? 4. What is the difference between membrane irritability and membrane conductivity? NAME ___________________________________ LAB TIME/DATE _______________________ a. threshold b. sodium c. potassium d. resting membrane potential e. absolute refractory period f. depolarization d f b a e c irritability conductivity sodium-potassium pump sodium potassium protein ions
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This note was uploaded on 10/06/2010 for the course BISC 104LXG at USC.

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BISC 104 - Physio Ex_Exercise 3 Answer Sheet - Neurophysiology of Nerve Impulse

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