Give an example of a reaction you may have to stimulation of the nervous system.

To save our mental energy, we need the nervous system to perform autonomic and involuntary actions. Without it, we can't control our hands and feet, maintain a steady heart rate or breathe.
example：
1. vision
2. Blink of an eye
3. sneezing
4. Counter or escape reaction
5. Retracting (pulling your hand away from a hot stove)