Question

question 74
a nerve impulse travels from one end of an axon to the other by
a movement of proteins out of the cell.
b diffusion.
c neurotransmitters.
d the synapse.
e action potentials.

Explanation:

To solve this, we analyze each option:

• Option A: Nerve impulses don’t involve protein movement out of the cell for propagation. Eliminate.
• Option B: Diffusion is passive and not how nerve impulses travel along an axon. Eliminate.
• Option C: Neurotransmitters are used at synapses (between neurons), not along an axon. Eliminate.
• Option D: The synapse is the gap between neurons, not the mechanism for axonal impulse travel. Eliminate.
• Option E: Action potentials are the electrical signals that propagate along an axon, allowing the nerve impulse to travel from one end to the other.

Answer:

E. action potentials