ExamVeda
Login
Home

The size of the pupil is controlled by the

This question belongs to General Knowledge Biology
Biology
?

The size of the pupil is controlled by the

Answer & Solution
Correct Answer: Option B
The size of the pupil is controlled by the activities of two muscles: the circumferential sphincter muscle found in the margin of the iris, innervated by the parasympathetic nervous system: and the iris dilator muscle, running radially from the iris root to the peripheral border of the sphincter.
Examveda
Question posted by Examveda
Community

Join the Discussion

No comments yet Be the first to discuss this question.
Keep Learning

Related Questions on Biology

Ordinary table salt is sodium chloride. What is baking soda?
A. Potassium chloride B. Potassium carbonate C. Potassium hydroxide D. Sodium bicarbonate
Ozone hole refers to
A. hole in ozone layer B. decrease in the ozone layer in troposphere C. decrease in thickness of ozone layer in stratosphere D. increase in the thickness of ozone layer in troposphere
Pine, fir, spruce, cedar, larch and cypress are the famous timber-yielding plants of which several also occur widely in the hilly regions of India. All these belong to
A. angiosperms B. gymnosperms C. monocotyledons D. dicotyledons
Pollination is best defined as
A. transfer of pollen from anther to stigma B. germination of pollen grains C. growth of pollen tube in ovule D. visiting flowers by insects
More Related Questions on Biology