A reflex action is the way the body quickly reacts to dangerous situations. It
follows a sequence which does not involve the brain.
This nerve action is called the reflex arc.
The reflex arc process –
⇒ The receptor detects the stimulus
⇒ Sensory neurons send the impulse to the spinal chord
⇒ The spinal chord sends an impulse via the motor neurone
⇒ The effector then responds