Humans have reflexes. Describe the route of an impulse through a reflex arc.

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First of all, the IMPULSE IS DECTECTED by receptors.

SENSORY neurone passes impulse onto RELAY NEURONE in SPINAL CORD.

RELAY neurone passes impulse onto MOTOR neurone

MOTOR neurone passes impulse to EFFECTOR MUSCLE/GLAND

Effector initiates RESPONSE

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