Multiple Choice
In a typical neuron, which part contains the nucleus?
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9. Transport Across Membranes
Ion Channels and Neurons
Multiple Choice
In a typical neuron, what is the primary function of the cell body (soma)?
A
It houses the nucleus and most organelles and integrates incoming signals to support neuronal metabolism and function.
B
It primarily serves as the site of saltatory conduction between nodes of Ranvier.
C
It generates action potentials and rapidly propagates them over long distances via myelinated segments.
D
It releases neurotransmitter into the synaptic cleft through voltage-gated calcium channel activation at the axon terminal.
Verified step by step guidance1
Step 1: Understand the structure of a neuron, which typically includes the cell body (soma), dendrites, axon, and axon terminals.
Step 2: Recognize that the cell body (soma) contains the nucleus and most of the organelles, which are essential for maintaining the neuron's metabolic activities.
Step 3: Know that the soma integrates incoming signals received from the dendrites, processing these inputs to determine if an action potential should be generated.
Step 4: Differentiate the functions of other parts of the neuron: saltatory conduction occurs along the myelinated axon segments, action potentials are generated at the axon hillock and propagated along the axon, and neurotransmitter release happens at the axon terminals.
Step 5: Conclude that the primary function of the cell body is to house the nucleus and organelles and to integrate incoming signals to support neuronal metabolism and function.
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