Answer & Solution
Answer: Option B
Solution:
Definition: Afferent nerve fibers are sensory fibers that transmit information from receptors in the body, such as skin, muscles, and glands, to the central nervous system (brain and spinal cord). They act like incoming communication lines carrying messages toward the brain.
Direction of signals: Afferent fibers carry sensory signals
to the brain, while efferent fibers carry motor or autonomic signals
from the brain to the body.
Why Option B is incorrect: Sending information from the brain to muscles is the function of
efferent nerve fibers (motor nerves), not afferent fibers. Afferent fibers never send commands outward; they only bring sensory information inward.
Why the others are correct:
Option A is true because afferent fibers are present in the spinal cord.
Option C is true because autonomic sensory feedback from glands can be carried to the brain.
Option D is true because glands can send signals to the brain through afferent pathways.
Conclusion: Since afferent nerve fibers do not carry information from the brain to the muscles, the statement in
Option B is not true.
