Question

State whether the following statement is True or False, rewrite the correct form of the statement by changing the first or the last word only.

Dilation of the pupil is brought about by the sympathetic nervous system.

• A. True
• B. False

Answer 1

The correct option is A True

Autonomic nervous system:

1. The autonomic nervous system is part of the peripheral nervous system.
2. The autonomic nervous system controls bodily functions which are not controlled voluntarily.
3. It has two categories - the sympathetic nervous system and the parasympathetic nervous system.

Parasympathetic nervous system:

1. The parasympathetic nervous system is cranio-sacral in nature (originating from cranial ( iii, vii, ix, and x ) and sacral region ( s₂,s₃, and s₄)).
2. Generally, the response of this nervous system is known as the ‘rest and digest’ response (normal condition).
3. It controls normal and regular autonomic activity.
4. It decreases heartbeat and blood pressure, contracts pupil, increases bile and digestive juices secretion, etc.

Sympathetic nervous system:

1. Sympathetic nerves originated from the thorax and lumbar region.
2. During anger, fear, etc, the activity of the sympathetic nervous is increased.
3. It increases heart rate and blood pressure, dilates pupil, increases sweat secretion, reduces the secretion of saliva, expands bronchioles of the lungs, inhibits the secretion of bile and digestive juices, etc.

Final Answer: Hence, the given statement is true.