Multiple Choice
Which of the following types of neurons primarily secrete acetylcholine as their neurotransmitter?
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45. Nervous System
Neurons and Action Potentials
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A nerve impulse moves toward a neuron's cell body along _____.
A
synaptic terminals
B
dendrites
C
myelin sheaths
D
axons
Verified step by step guidance1
Understand the structure of a neuron: A neuron consists of three main parts - the cell body (soma), dendrites, and axon. Dendrites receive signals, the cell body processes them, and the axon transmits them to other neurons or effectors.
Recall the function of dendrites: Dendrites are branched extensions of the neuron that receive incoming signals (nerve impulses) from other neurons or sensory receptors and transmit them toward the cell body.
Eliminate incorrect options: Synaptic terminals are the ends of axons where signals are transmitted to other neurons or cells, so they are not involved in moving impulses toward the cell body. Myelin sheaths are insulating layers around axons that speed up signal transmission, but they do not move impulses toward the cell body. Axons carry impulses away from the cell body, not toward it.
Identify the correct answer: Since dendrites are responsible for transmitting nerve impulses toward the cell body, the correct answer is 'dendrites.'
Summarize the reasoning: The nerve impulse moves toward a neuron's cell body along dendrites because they are specialized for receiving and transmitting signals to the soma for processing.
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