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Test_04_5_Q - Test4&5 CBNS106 Lectures 04 and 05 Problem...

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Test4&5; CBNS106; Lectures: 04 and 05 Page 1 of 3 Problem set for lecture 4 and 5: Action Potential Reading Assignment: Bear et al. Chapters 4 & 5 1. How does myelin help increase conduction velocity? Choose the correct option. A) It provides electrical insulation. B) It makes the membrane more excitable. C) It contains voltage-gated sodium channels. D) It increases axonal diameter. 2. What is the absolute refractory period? Choose the correct option. one is initiated. milliseconds due to sodium channel inactivation. potassium channels close. 3. The spike-initiation zone in most peripheral sensory neurons occurs near the sensory nerve endings. A) True B) False 4. The part of the neuron where an axon originates from the soma is called the ____. It is also called the spike-initiation zone. A) True B) False
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