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A spinal reflex differs from a normal sensory and motor reaction in that
(A) a spinal reflex occurs only in response to extremely stressful stimuli.
(B) in a spinal reflex, the spine moves the muscles in response as soon as the sensory information reaches the spine while usually the impulse must reach the brain before a response.
(C) in a normal sensory/motor reaction, the spine transmits the information through afferent nerve fibers, while reflex reactions are transmitted along special efferent nerves.
(D) spinal reflexes are part of the central nervous system response, while normal sensory/motor reactions are part of the peripheral nervous system.
(E) spinal reflexes occur only in animals because humans are born without instinctual responses.
Spoiler
Answer
(B) in a spinal reflex, the spine moves the muscles in response as soon as the sensory information reaches the spine while usually the impulse must reach the brain before a response.
Spoiler
Explanation
Spinal reflexes, such as the reflex that causes your leg to move when a doctor strikes your leg just below your kneecap, are controlled by the spine, not the brain. Stress is not relevant to the process, nor are afferent and efferent nerves. All spinal reflexes involve the peripheral nervous system. Humans do have some spinal reflexes; they are not limited to animals.
Posted : 26/01/2024 9:46 am