A Researcher Isolated a Neuronal Axon from the Brain of a New

question 8

Multiple Choice

A researcher isolated a neuronal axon from the brain of a new species of squirrel and noticed that it was covered in a myelin sheath.What are the likely origins of this axon? (Check all that apply)

• A) Central nervous system (CNS)
• B) Peripheral nervous system (PNS)
• C) Areas composed of white matter
• D) Areas composed of gray matter

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Definitions:

Spinal Cord

The major bundle of nerves running down the spine, connecting the brain to the rest of the body, responsible for transmitting sensory and motor information.

Deafferentation

Loss of incoming sensory input, usually due to damage to sensory fibers; also, loss of any afferent input to a structure.

Motor Output

The physical response or movement produced by the nervous system in response to internal or external stimuli.