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 per unit length in a nqw:0s gxt,-5hu cdu,kon-myelinated neuron v8spb+45 l04j0hsvguxrbw 6 )7bo kjb than in a myelinated neur jsb8bjk4r5vpxhb 46b +0)7sgvl w0ouon?
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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