A synapse is the junction between a sending neuron and a receiving neuron where neurotransmitters are released to transmit signals between neurons. Option A refers to acetylcholine, a specific neurotransmitter that triggers muscle contractions, while option B describes a reflex arc which is an automatic response to sensory input. Option D describes a nerve bundle known as a nerve or fascicle.

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A Synapse Is A(n)

Question 297

Multiple Choice

A synapse is a(n)

A) chemical messenger that triggers muscle contractions.
B) automatic response to sensory input.
C) junction between a sending neuron and a receiving neuron.
D) neural "cable" containing many axons.

Correct Answer: