Review quiz 2 - Lecture 3

Review quiz 2 - Lecture 3 - c. There is a point during the...

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Review quiz: Lecture 3 Choose the most incorrect answer. 1. Action potential a. In a passive electrical response, Ohm’s Law can be used to evaluate the current and voltage relationship. b. The voltage response lags behind an injected current step. c. The amplitude of the action potential will not vary if the duration of the initiating stimulus is varied. d. The threshold voltage for a population of cells is stable, but the threshold voltage for a given cell can vary significantly depending on the characteristics of the stimulus current. e. In many cells, following the action potential, the membrane potential transiently becomes even more negative than its resting value. 2. Action potential a. Inactivation of the Na + conductance occurs before the peak of the K + conductance is reached. b. The slow deactivation of K + channels contributes to membrane hyperpolarization.
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Unformatted text preview: c. There is a point during the action potential at which the inward flow of Na + is exactly balanced by the outward flow of K + . d. The resting membrane potential is set primarily by a leak K + conductance. e. Concentration changes of Na + and K + inside and outside the cell are the major players during an action potential. Action potential a. During the relative refractory period, there is still an outward K + current. b. The larger the length constant, the better the conduction properties of the cable. c. Decreasing the membrane resistance by wrapping the axon in a myelin sheath increases the speed of action potential propagation. d. The greater the cross-sectional area of an axon, the greater the speed of action potential propagation. e. The cell body has a smaller surface area to volume ratio than the axon....
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Review quiz 2 - Lecture 3 - c. There is a point during the...

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