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Set 5 Generation And Conduction Of Action Potentials

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Question 1

(Multiple Choice)

Free
The length constant of an unmyelinated axon increases as the diameter of the axon increases.This is primarily a result of:

A)Increasing membrane capacitance.
B)Decreasing membrane capacitance.
C)Increasing membrane resistance.
D)Decreasing membrane resistance.
E)Decreasing axoplasmic resistance.

Answer

Question 2

(Multiple Choice)

Free
Which of the following events is common to all types of sensory receptors?

A)The generation of a receptor potential.
B)The generation of an action potential.
C)The binding of a stimulus to a receptor.
D)The binding of a stimulus to a membrane channel.
E)Membrane depolarization.

Answer

Question 3

(Multiple Choice)

Free
The axon membrane responds to an intracellular injection of a subthreshold positive current with:

A)Transient depolarization only in the region where the current is injected.
B)Maintained depolarization until negative current is injected.
C)Maximal depolarization locally and attenuated depolarization along the axon.
D)Immediately opening K+ channels to maintain resting potential.
E)Firing an action potential.

Answer