In a thin section through brain tissue, you see a cell that is wrapped around the axon of a neuron, forming concentric layers of cell membrane.This cell most likely
A) is part of the blood‒brain barrier.
B) supplies nutrients to neurons.
C) gives structural support to the axon.
D) insulates the axon for rapid conduction of action potentials.
E) recycles neurotransmitter in the synapses.

Question

Quizplus · Accepted Answer

The cell described in the question is a myelin-forming cell, also known as an oligodendrocyte or Schwann cell, which wraps around the axon of a neuron to form concentric layers of cell membrane. This wrapping provides insulation to the axon, allowing for rapid conduction of action potentials. Therefore, the best choice is D.

In a Thin Section Through Brain Tissue, You See a Cell