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Neural Control and Coordination
Sense Organs – Structure of the Human Eye
2 questions from 2 papers, each with its answer.
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All Questions
2023 1 question
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Match List-I with List-II with respect to human eye.
Pick the matching item from Column II for each row.
Column I
- A. Fovea
- B. Iris
- C. Blind spot
- D. Sclera
Column II
- I. Visible coloured portion of eye that regulates diameter of pupil.
- II. External layer of eye formed of dense connective tissue.
- III. Point of greatest visual acuity or resolution.
- IV. Point where optic nerve leaves the eyeball and photoreceptor cells are absent.
Correct answer: A → III, B → I, C → IV, D → II
The fovea gives greatest visual acuity, the iris is the coloured part, the blind spot lacks photoreceptors, and the sclera is dense connective tissue.
The fovea is a thinned-out portion of the retina where only the cones are densely packed. It is the point where the visual acuity (resolution) is the greatest. The visible coloured portion of the eye is iris. The diameter of the pupil is regulated by the muscle fibres of iris. Blind spot contains no photoreceptor cells. It is also a region where the optic nerves leave the eye and the retinal blood vessels enter it. The external layer of an eyeball is composed of a dense connective tissue and is called the sclera.
2018 1 question
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The transparent lens in the human eye is held in its place by
Suspensory ligaments from the ciliary body hold the lens.
The lens in the human eye is held in its place by suspensory ligaments attached to the ciliary body.