Scelta multipla
Which of the following is a possible result of inhibitory postsynaptic potentials (IPSPs)?
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45. Nervous System
Neurons and Action Potentials
Scelta multipla
In the diagram of a typical neuron, which letter indicates the region where neurotransmitters are released?
A
D. Node of Ranvier
B
A. Axon terminal
C
C. Cell body (soma)
D
B. Dendrite
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Understand the structure of a neuron: A neuron consists of several key parts, including the dendrites, cell body (soma), axon, axon terminals, and sometimes nodes of Ranvier. Each part has a specific function in transmitting nerve signals.
Learn the function of the axon terminal: The axon terminal is the endpoint of the axon where neurotransmitters are stored in vesicles. These neurotransmitters are released into the synaptic cleft to communicate with the next neuron or target cell.
Differentiate the other options: (1) Dendrites receive incoming signals from other neurons. (2) The cell body (soma) contains the nucleus and processes incoming signals. (3) The Node of Ranvier is a gap in the myelin sheath that facilitates the rapid conduction of nerve impulses.
Identify the correct region for neurotransmitter release: Based on the function of each part, neurotransmitters are released from the axon terminal, not the dendrites, soma, or Node of Ranvier.
Conclude that the correct answer is A. Axon terminal, as it is the specific region responsible for releasing neurotransmitters into the synaptic cleft.
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