Question

The substance released at axon terminals to propagate a nervous impulse is called a(n) ________.

a.neurotransmitter
b.cholinesterase
c.ion
d.biogenic amine

Answer 1

The substance released at axon terminals to propagate a nervous impulse is called a neurotransmitter. The correct option is a.

Step-by-step explanation:

Neurotransmitters are released at axon terminals to propagate a nervous impulse across a synapse to another cell. They bind to the membrane of the receiving cell and allow the nerve impulse to travel through. Neurotransmitters are chemicals that carry nerve impulses from the axon of a neuron to another cell across the synapse.

1. When a nerve impulse reaches the end of an axon, the axon releases neurotransmitters.
2. The neurotransmitters travel across the synapse between the axon and the dendrite of the next neuron.
3. The neurotransmitters bind to the membrane of the dendrite.
4. The binding allows the nerve impulse to travel through the receiving neuron.

Hence, a is the correct option.