You are studying a cross-sectional tissue slice of a nerve using a transmission electron microscope. You find an area where there appears to be a small amount of cytoplasm surrounded by about 100 layers of stacked cell membranes.You conclude that you have found
A)a neuron cell body.
B)a synapse.
C)an unmyelinated axon.
D)a myelinated axon.

Question

You are studying a cross-sectional tissue slice of a nerve using a transmission electron microscope.  You find an area where there appears to be a small amount of cytoplasm surrounded by about 100 layers of stacked cell membranes.You conclude that you have found
A)a neuron cell body.
B)a synapse.
C)an unmyelinated axon.
D)a myelinated axon.

Quizplus · Accepted Answer

The presence of about 100 stacked layers of cell membranes indicates myelin, which is characteristic of a myelinated axon. Additionally, the small amount of cytoplasm suggests that this area represents the axon, rather than the cell body or synapse.

You Are Studying a Cross-Sectional Tissue Slice of a Nerve