Question at position 5 A neuron has more than one:SomaAxonDendriteNucleusClear my selection单项选择题
A
Soma
B
Axon
C
Dendrite
D
Nucleus

Question

Question at position 5 A neuron has more than one:SomaAxonDendriteNucleusClear my selection

BlackTom AI · Accepted Answer

Neurons typically have multiple dendrites that receive synaptic input, so "Dendrite" is the correct choice.

1) Relevant knowledge points and concepts
- Neuron basic parts: dendrites (input branches), soma/cell body (integrates inputs), nucleus (genetic/control center inside the soma), and axon (single long process that conducts action potentials away from the soma).
- Typical counts: many dendrites, one soma, one nucleus, usually one axon (though the axon can branch into collaterals).

2) Step-by-step reasoning
- Examine each option in turn and decide whether a neuron commonly has more than one of that structure.
  a) Soma — every neuron has one soma (cell body). It is not common to have multiple somas in a single neuron.
  b) Axon — most neurons possess a single axon. While that axon can branch extensively (axon collaterals), there is typically one axon originating from the soma.
  c) Dendrite — neurons characteristically have many dendritic processes; these increase surface area for receiving inputs from many other neurons.
  d) Nucleus — typically one nucleus resides within the soma; not multiple.

3) Intermediate steps / supporting details
- Dendrites: their branching pattern (dendritic arbor) can be extensive, providing multiple input sites. This directly supports the statement "more than one" because dendrites are plural by design.
- Axon collaterals do not count as multiple axons; they are branches of the single axon.

4) Why the correct answer is correct
- "Dendrite" is correct because the defining morphology of most neurons includes many dendritic branches. That is the anatomical feature present in multiple copies per neuron to receive synaptic contacts.

5) Why other options are incorrect
- Soma: typically a single cell body.
- Axon: usually one axon per neuron (even if branched).
- Nucleus: typically one nucleus inside the soma.

6) Conclusion
Therefore the correct answer is Dendrite, which matches the provided answer.

Question at position 5 A neuron has more than one:SomaAxonDendriteNucleusClear my selection单项选择题

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