Exercise 3: Neurophysiology of Nerve Impulses: Activity 7: The Action Potential: Conduction Velocity Lab Report
Pre-lab Quiz Results
You scored 100% by answering 5 out of 5 questions correctly.
1. An action potential can be propagated along an axon because there are __________ channels in the membrane.
You correctly answered: d. voltage-gated
2. The units of conduction velocity are
You correctly answered: d. meters/second.
3. Which of the following will affect axonal conduction velocity?
You correctly answered: c. both the diameter of the axon and the amount of myelination
4. Which of the following describes an A fiber?
You correctly answered: a. large diameter, heavily myelinated
5. Which of the following describes a C fiber?
You correctly answered: c. small diameter, unmyelinated
Post-lab Quiz Results
You scored 100% by answering 4 out of 4 questions correctly.
1. Action potential conduction velocity is fastest in which of the following fibers?
You correctly answered: a. A fibers
2. Action potential conduction velocity is slowest in which of the following fibers?
You correctly answered: c. C fibers
3. Why did the timescale have to be changed to measure the conduction velocity of the C fibers?
You correctly answered: b. The total time shown on the oscilloscope would have been too short to see the action potential at
R2.
4. The axons from touch fibers are A fibers, and the axons from pain fibers are C fibers. When you stub your toe, which
would you expect to perceive first?
You correctly answered: b. your toe touching something
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