2 02
Human reactions are a response to an external change.
02
Reflex actions help to protect the body against damage.
Figure 2 shows the nervous pathway for a reflex action.
Figure 2
Hot pan
Muscle in arm
A stimulus from the hot pan will cause the muscle in the arm to contract and move the
finger away.
Describe how the stimulus from the hot pan reaches the muscle in the arm.
[4 marks]​