describe the structure and functioning of a simple reflex arc illustrated by the withdrawalof a finger from a hot object
Many reflexes protect you.
they happen very quickly so you dont harm yourself.
the pathway of the impulse along the neurons is called a reflex arc
Stimulus = hot flame
Receptor = heat sensor in the skin.
- The impulse travels to the spinal cord along the sensory neurone.
- In the spinal cord the impulse is passes on to the relay neurone.
- This passes the impulse on to the motor neurone.
Effector = Arm muscles. The motor neuron carries the impulse to the muscle in the arm
Response = Muscles contract to remove the hand from the hot object
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