Reflex Arc

Question 1

What is a reflex arc and an example

Answer 1

An immediate involuntary action in response to a stimulus, they can act on an impulse before it reaches the brain.

If we touch something hot, we pull our hand away

Question 2

4 Stages of a reflex arc

Answer 2

Receptor- receptor in skin detects a stimulus

Sensory neuron- sensory neuron sends electrical impulses to a relay neuron.

Relay neurons connect sensory neurons to motor neurons-motor neuron sends electrical impulses to an effector

Effector- effector produces a response (muscle contracts to move hand away)

Question 3

What is a stimulus and response

Answer 3

Stimulus- a change in something such as temperature

Response- a reaction to the stimulus (muscle contracting to move hand away)

Question 4

Where is the relay neuron located

Answer 4

In the spinal cord in the Central nervous system