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The ciliary body...

The ciliary body

A

Is the part of sclera

B

is the part of the iris of the eye

C

Secretes the vitreous humor

D

Contains smooth muslces that attach to the lens by suspensory ligaments

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The correct Answer is:
D
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I. Association areas, which are mainly motor in function, are responsible for functions like intersensory associations, memory, and communication. II. Midbrain and hindbrain forms the brain stem. III. The ciliary body itself continues forward to form a pigmented and opaque structure- iris. IV. The membranous labyrinth is filled with a fluid called endolymph. How many of the given statements are correct?

The wall of the eye ball if composed of three layers. Which character is not related with eye ? i. At the retina yellowish pirmented spot called macula lutea ii. The ciliary body itself contines forward to form a pigment and opaque structure called the iris. iii. The twilight (scotopic) vision and colour vision are functions of cones and the daylight (photopic) vision is the function of the rods iv. The rods contain a purplish-red protein called the rhodopsin, which contains a derivative of vitamin-A v. In the human eye, there are three types of cones which possess their own characteristic photo pigments that respond to red, green and yellow lights. vi. Photoreceptor cells are not present in blind spot vii. The fovea is a thinned-out portion of the retina where only the rod cells are densely packed

Describe the location and the role of ciliary body in human eye.

Assertion :- Accomodation is done by Iris of eye. Reason:- Lens is biconcave and flexible in nature and ciliary body muscles does not help for this process.

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

Identify the incorrect statement i. Sclera is composed of dense connective tissue ii Cornea contains many blood vessels iii. Thickness of choroid layer is uniform throughout the eye ball iv. Choroid layer posteriorly forms ciliary body

Muscles of Iris & Ciliary body originate :-

What is the function of the ciliary muscles?

TRUEMAN BIOLOGY-NEURAL CONTROL AND COORDINATION-MCQ
  1. The glands which help in absorbing odoriferous substances to stimulate...

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  2. A molecule cannot be tasted or smelled unit it has been

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  3. The ciliary body

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  4. Given these structures 1. Lens 2. Aqueous humor 3. vitreous humor 4....

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  5. Aqueous humor

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  6. Given the area of the retina 1. Macula 2. Fovea centralis 3. Optic d...

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  7. Which of the following is correct for lens focusing, while seeing dist...

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  8. Fovea in the eye is a central pit in the yellowish pigmented spot call...

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  9. High frequency sound waves vibrate the basilar membrane

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  10. The order of the three layers of cells in the retina of human eye from...

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  11. In the statement "three are several ventricles in the brain and some o...

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  12. Which of the following statement is//are correct ? (i) Formation of ...

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  13. Fight or flight activation of the autonomic nervous system causes whic...

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  14. The adrenal medulla is a mass of neurons with all of the following cha...

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  15. Action potential is

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  16. Which of the following is wrongly matched ?

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  17. Which one of the following is the correct sequence of cranial nerves i...

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  18. Cochlea is divided into three chambers or spaces 1. Scala vestibuli ...

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  19. Consider the following statements sympathetic nervous system is charac...

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  20. Consider the following statements regading Na-K Pump 1. It utilizes ...

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