nbsp-how is iris different from ciliary muscles-

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Physics

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Question

how is iris different from ciliary muscles?

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Solution

Dear Student!
Ciliary muscles are the are the circular sheet of smooth muscle fibres that form bundles of circular and radial muscles which alter the shape of lens during accomodation.
Iris is the circular muscular diaphragm containing the pigment which gives the eye its colour. It controls the amount of light entering the eye.

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Similar questions

Q. Answer the following.

State the function of iris and ciliary muscles in human eye.

Q. Muscles of iris and ciliary body originate from

(a) Draw a labelled diagram of the human eye. Label the following parts on this diagram: Cornea, Iris, Pupil, Ciliary muscles, Eye-lens, Retina, Optic nerve and Blind spot.

(b) What are the functions of the following parts of the eye?

(i) Iris (ii) Eye-lens (iii) Ciliary muscles (iv) Retina (v) Optic nerve

The change in converging power of an eye-lens is caused by the action of:

(a) iris

(b) ciliary muscles

(d) retina

Q. Study the following and identify the incorrect statements
(i) Muscles of iris and ciliary body are smooth muscles of mesodermal origin
(ii) Slow and sustained involuntary contraction of smooth muscles are called spasms
(iii) Quiescent mononucleate myogenic cells of skeletal muscles are called pericytes
(iv) Skeletal muscles fibre is multinucleate and is a syncytium

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