Biology - Neural Control and Coordination Question with Solution | TestHub
Match parts of human eye in Column I with their structure characteristic in Column II:
| Column I | Column II |
|---|---|
| (A) Fovea | (I) Visible coloured portion of eye that regulates diameter of pupil. |
| (B) Iris | (II) External layer of dense connective tissue |
| (C) Blind spot | (III) The place of sharpest vision |
| (D) Sclera | (IV) Point where optic nerve leaves the eyeball and photoreceptor cells are absent. |
Choose the correct answer form the following options.
Options:
Answer:
Solution:
Fovea is a thinned-out portion of the retina where only the cones are densely packed. It is the point where visual acuity (resolution) is the greatest, making it the place of sharpest vision. Thus, A matches III.
Iris is the anterior portion of the choroid which forms the pigmented and opaque structure. It is the visible coloured portion of the eye that regulates the diameter of the pupil. Thus, B matches I.
Blind spot is the region on the retina where the optic nerve leaves the eye and retinal blood vessels enter it. Photoreceptor cells are absent in this region. Thus, C matches IV.
Sclera is the external layer of the wall of the eyeball, composed of dense connective tissue. Thus, D matches II.
The correct matching is A-III, B-I, C-IV, D-II.
Answer: A-III, B-I, C-IV, D-II
