Question

The velocity of conduction of action potentials along a nerve will be increased by?

1) Stimulating the Na⁺-K⁺ pump
2) Inhibiting the Na⁺-K⁺ pump
3) Decreasing the diameter of the nerve
4) Myelinating the nerve
5) Lengthening the nerve fiber

Answer 1

Myelinating the nerve increases the velocity of conduction of action potentials along a nerve. Hence the correct answer is option 4

Step-by-step explanation:

The velocity of conduction of action potentials along a nerve will be increased by 4) Myelinating the nerve. Myelin acts as an insulator that prevents current from leaving the axon, increasing the speed of action potential conduction. In addition, the diameter of the nerve (axon) can also influence the speed of conduction. A wider axon allows for faster spread of depolarization, similar to how water runs faster in a wide river than in a narrow creek.

Hence the correct answer is option 4