A student nurse is tutoring another student on anatomy and physiology. What does the tutor explain is the function of myelin sheaths on certain nerves?
A.
Allow rapid transmission of nerve impulses
B.
Assist in long-term storage of memories
C.
Prevent "cross-communication" between nerves
D.
Protect the nerves from temperature changes
ANS: A
White matter in the brain consists of nerves coated with myelin sheaths, which allow nerve impulses to travel rapidly.
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