McGraw-Hill Online Learning Center Test

McGraw-Hill Online Learning Center Test


1. Review the image and answer the following questions.

Why is saltatory conduction faster than conduction in an unmyelinated axon?

A. A stronger nerve impulse can be carried on myelinated neurons.
B. Action potentials jump from node to node; the amount of membrane to depolarize is less.
C. Myelinated neurons have faster sodium-potassium pumps.
D. Nerve connections are permanent on myelinated neurons and transitory on unmyelinated neurons.


2. What is not true about action potentials traveling via saltatory conduction?

A. Impulses travel at the rate of 1.0 m/second.
B. The impulse is self-propagating.
C. Transmission of the impulse is an all-or-none event.
D. The impulse travels at the rate of 100 m/second.
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