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
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1 Answers

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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