Multiple Choice
Which of the following sequences correctly describes the order of events during the generation of an action potential in a neuron?
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45. Nervous System
Neurons and Action Potentials
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Which part of a neuron contains vesicles that house neurotransmitters?
A
Myelin sheath
B
Dendrites
C
Cell body (soma)
D
Axon terminals
Verified step by step guidance1
Step 1: Understand the structure of a neuron. A neuron consists of several key parts: dendrites, cell body (soma), axon, axon terminals, and myelin sheath. Each part has a specific function.
Step 2: Learn the role of axon terminals. Axon terminals are the small, bulb-like structures at the end of the axon. They are responsible for transmitting signals to other neurons, muscles, or glands.
Step 3: Recognize the function of vesicles in axon terminals. These vesicles contain neurotransmitters, which are chemical messengers that facilitate communication between neurons across synapses.
Step 4: Eliminate incorrect options. The myelin sheath is a protective covering that insulates the axon and speeds up signal transmission. Dendrites receive signals from other neurons, and the cell body (soma) contains the nucleus and other organelles but does not house neurotransmitter vesicles.
Step 5: Conclude that the correct answer is axon terminals, as they are the part of the neuron that contains vesicles housing neurotransmitters.
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