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PEX-03-07 - Exercise 3 Neurophysiology of Nerve Impulses...

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Exercise 3: Neurophysiology of Nerve Impulses: Activity 7: The Action Potential: Conduction Velocity Lab Report Pre-lab Quiz Results You scored 80% by answering 4 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 Your answer : a. millivolts. Correct answer: 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 09/13/12 page 1
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09/13/12 page 2 Experiment Results Predict Question: Predict Question 1: How will the conduction velocity in the B fiber compare with that in the A Fiber? Your answer : b. The conduction velocity in the B fiber will be slower because the B fiber has a smaller diameter and less myelination. Predict Question 2: How will the conduction velocity in the C fiber compare with that in the B Fiber? Your answer : b. The conduction velocity in the C fiber will be slower because the C fiber has a smaller diameter and less myelination. Stop & Think Questions: 3. Note the difference in time between the action potential recorded at R1 and the action potential recorded at R2. The distance between these sets of recording electrodes is 10 centimeters (0.1 m).
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