Question

The proximal part of an axon is usually marked by an axon hillock, which is a tapered extension of the cell body that lacks Nissl substance. What is the function of the axon hillock?

1) Initiating and propagating action potentials
2) Synthesizing proteins
3) Receiving and integrating signals from other neurons
4) Secreting neurotransmitters

Answer 1

The axon hillock functions to initiate and propagate action potentials.

Step-by-step explanation:

The function of the axon hillock is 1) initiating and propagating action potentials. The axon hillock is a specialized region of the cell body where the action potential is generated and then propagated down the axon. The absence of Nissl substance in the axon hillock allows for efficient transmission of electrical impulses.