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Standard VIII
Biology
Question

Ciliary muscles are found in
  1. Junction of choroid and iris in eye ball
  2. Inside larynx to regulate tension in eye ball
  3. Between ribs to assist in breathing movement
  4. At base of cilia in ciliated epithelium

A
Junction of choroid and iris in eye ball
B
At base of cilia in ciliated epithelium
C
Inside larynx to regulate tension in eye ball
D
Between ribs to assist in breathing movement
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Solution
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Thickening of choroid behind iris forms a ciliary body that consists of ciliary muscles. So, ciliary muscles are present at the junction of choroid and iris in the eyeball. Relaxation and contraction of ciliary muscles regulate the shape of the lens to focus on distant and near objects.
So, the correct answer is option A.

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