HUMAN PHYSIOLOGY
CONTROL AND COORDINATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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In reflex action, the reflex arc is formed by-
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Muscle, receptor, brain
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Brain, spinal cord, muscle
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Receptor, spinal cord, muscle
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muscle, spinal cord, receptor
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Explanation:
Detailed explanation-1: -In reflex actions, a reflex arc is formed by impulses from the receptor reaching the spinal cord and the appropriate reflex impulse then being sent to the muscles by the spinal cord. The impulse is not sent to the brain, to reduce response time.
Detailed explanation-2: -Final answer: In a reflex action, the reflex arc is formed by the impulse from the receptor.
Detailed explanation-3: -A reflex arc is a neural pathway that controls a reflex. In vertebrates, most sensory neurons do not pass directly into the brain, but synapse in the spinal cord. This allows for faster reflex actions to occur by activating spinal motor neurons without the delay of routing signals through the brain.
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