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Topic: Neural control: neuron, nervous system, nerve impulse· Human Physiology

Which of the following statements is correct ?

1. Cornea is an external, transparent and protective proteinacious covering of the eye-ball.

2. Cornea consists of dense connective tissue of elastin and can repair itself.

3. Cornea is convex, transparent layer which is highly vascularised.

4. Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.

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Answer: 4. Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye.

Key idea: The cornea is made of dense collagen matrix and is highly sensitive.

The cornea is the transparent, avascular (no blood vessels), convex outer layer. It consists of collagen fibres and has many pain receptors, making it the most sensitive part of the eye. Statement 1 is wrong (the cornea is made of collagen, and the protein-rich protective coat of the eye-ball is mainly the sclera), 2 is wrong (collagen, not elastin) and 3 is wrong (it is non-vascular).

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report
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