What Structure Is Found Around PNS Axons That Is NOT

question 26

Multiple Choice

What structure is found around PNS axons that is NOT found around CNS axons?

• A)nodes of Ranvier
• B)myelin sheath
• C)neurilemma
• D)plasma membrane

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Definitions:

Membrane

A selective barrier that allows some substances to pass while excluding others, fundamental to cellular function and structure.

Impulses

Impulses are sudden urges to act or rapid electrical discharges that travel along nerve fibers, facilitating communication between different parts of the body.

Stretch-Activated Channels

Ion channels that open in response to mechanical deformation of the cell membrane, playing a role in various physiological processes.

Motor Neurons

Motor neurons are nerve cells that originate in the spinal cord and brainstem and send signals to muscles, stimulating them to contract and produce movement.