Question

State whether true or false.

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

• A. True
• B. False

Answer 1

The correct option is A True

Sympathetic nervous system (SNS)

1. The SNS is a branch of the autonomic nervous system (ANS). It regulates involuntary activities of the body.
2. The SNS works in an antagonistic manner to the parasympathetic nervous system (PNS). The nerves of the SNS arise from the thoracic (chest) and lumbar (abdominal) areas of the spinal cord.
3. The SNS prepares the body for abnormal conditions and violent actions. This is brought about by the release of noradrenaline at the nerve endings. Dilation of the pupil is brought by the activation of the SNS.

Final answer

Dilation of the pupil is brought about by the sympathetic nervous system.- The given statement is true