本题目来源于试卷: Interaction & Interdependence C.5 Neural Signaling，类别为 IB生物学
[单选题]
Which two features are more abundant u38 aak)a-i/ltya 6 cbper unit length in a non-myelinhp7p9m )ffhje+ 8 /dodated neuron than in a myelinated neur/d+pjfe)p ho 7df8h9m on?
A. Sodium-potassium pumps and synaptic vesicles
B. Potassium ion channels and sodium-potassium pumps
C. Potassium ion channels and sodium-potassium pumps
D. Nodes of Ranvier and Schwann cells
参考答案: B
本题详细解析:
Explanation: Choice B is correct because cell membranes of myelinated neurons largely lack ion channels and pumps in regions of the axon that are myelinated. Choice A is incorrect because synaptic vesicles are not present in axons. Choice C is incorrect because the rough endoplasmic reticulum and Golgi apparatus are present in the cell body, not the axon. Choice D is incorrect because Nodes of Ranvier and Schwann cells are present on myelinated neurons, not non-myelinated neurons.
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