Question

question 22 of 25
1 point
__________ exclusively transmit impulses from the brain or spinal cord to the muscles or

select the correct response:

afferent nerve fibers

motor nerve fibers

mixed nerve fibers

sensory nerve fibers

Explanation:

To solve this, we analyze each option:

• Afferent (sensory) nerve fibers carry impulses to the brain/spinal cord, not from.
• Motor nerve fibers (efferent) transmit impulses from the central nervous system (brain/spinal cord) to muscles or glands to initiate action.
• Mixed nerve fibers have both sensory and motor fibers, so they don't exclusively transmit from CNS to effectors.
• Sensory nerve fibers (afferent) carry signals to the CNS, not from.

So the correct option is the one that transmits from CNS to muscles/glands.

Answer:

B. Motor nerve fibers