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Question

Parasympathetic system causes
  1. Inhibition of sweat glands
  2. Constriction of pupil in bright light
  3. Increase in rate of respiration
  4. Increase in heart beat

A
Increase in rate of respiration
B
Increase in heart beat
C
Inhibition of sweat glands
D
Constriction of pupil in bright light
Solution
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The pupillary light reflex is a reflex that controls the diameter of the pupil, in response to the intensity of light that falls on the retina of the pupil and the eye. Parasympathetic nerve fibres from the third (oculomotor) cranial nerve innervate the muscle that causes constriction of the pupil, whereas sympathetic nerve fibres control dilation.

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