Reflexes

Reflex arc pathway

Stimulus —> receptor —> sensory neurone —> relay neurone and spinal cord —> motor neurone —> effector

Knee-jerk reflex

• spinal reflex

  • does not involve brain

• helps to maintain posture and balance

Survival importance

• prevents from being overloaded

• immediate protection from birth as the response does not need to be learnt

• fast response

• controls everyday actions