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Question
Given below are a few situations. What effective change will occur in the organ/body part mentioned and which part (sympathetic or parasympathetic) of the autonomic nervous system brings it about?
| Situation | Organ/body part | Change/action | Part of autonomic nervous system involved |
| 1. You have entered a dark room | Eye | ||
| 2. Your body is consuming lot of glucose while running a race | Liver | ||
| 3. You are chewing a tasty food | Salivary gland | ||
| 4. You are running a race | Adrenal gland | ||
| 5. You are retiring to bed for sleep | Heart | ||
| 6. You are shivering in intense cold | Body hairs |
Solution
| Situation | Organ/body part | Change/action | Part of autonomic nervous system involved |
| 1. You have entered a dark room | Eye | Pupil dilates | Sympathetic |
| 2. Your body is consuming lot of glucose while running a race | Liver | Glycogen is converted into glucose in liver | Sympathetic |
| 3. You are chewing a tasty food | Salivary gland | Salivation increases | Parasympathetic |
| 4. You are running a race | Adrenal gland | Release of adrenaline and noradrenaline increases | Sympathetic |
| 5. You are retiring to bed for sleep | Heart | Heart rate slows down | Parasympathetic |
| 6. You are shivering in intense cold | Body hairs | Hair raised | Sympathetic |
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