reaction times/ reflexes

what is a reflex action

A reflex action is a protective, automatic and rapid response to a stimulus.

what is the reflex arc

The nerve pathway followed by a reflex action

what is the process of a reflex action

stimulus → receptor → **sensory neurone** → **relay neurone** → motor neurone → effector → response

what does a sensory neuron do

sends impulses to relay neurone in the spinal cord.

what does the relay neuron do

1. The relay neurone connects to the motor neurone (and also sends a message to the brain).

what does the motor neuron do

sends impulses to effector.

what are the main features of reflexes

fast, innate, protective