In reflex actions involving the limbs, the time taken for the signal to reach the effector is reduced because __________.
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The reflex arc
A receptor in the skin detects a stimulus (the change in temperature).
Sensory neurones send electrical impulses to relay neurones, which are located in the spinal cord. ...
Motor neurones send electrical impulses to an effector.
The effector produces a response (muscle contracts to move hand away).
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