Identify the various structures in a reflex arc in the context of a pin prick. What is the end response and why is this beneficial?

Stimulus --> receptor --> coordinator --> effector --> response. Pin prick --> skin receptors --> sensory neurone --> relay neurone --> motor neurone --> effector muscle --> contraction. The muscle contracts, pulling the arm away from the painful stimulus which protects the body from harm.

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Answered by Sai P. Biology tutor

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