Q. No.From inside to outside the correct order of the following cells in the retina would be:
1. Ganglion cells - Photoreceptor cells - Bipolar cells
2. Ganglion cells - Bipolar cells - Photoreceptor cells
3. Bipolar cells - Photoreceptor cells - Ganglion cells
4. Photoreceptor cells - Ganglion cells - Bipolar cells
Good vision depends on adequate intake of carotene rich food.
Select the best option from the following statements:
| i. | Vitamin A derivatives are formed from carotene |
| ii. | The photopigments are embedded in the membrane discs of the inner segment |
| iii. | Retinal is a derivative of Vitamin A |
| iv. | Retinal is a light-absorbing part of all the visual photopigments |
1. (i),(iii) and (iv)
2. (i) and (iii)
3. (ii), (iii) and (iv)
4. (i) and (iv)
Photosensitive compound in the human eye is made up of:
| 1. Opsin and Retinal | 2. Opsin and Retinol |
| 3. Transducin and Retinene | 4. Guanosine and Retinol |
Which of these sequences describes the correct path
for light rays entering the human eye?
1. sclera, retina, choroid, lens, cornea
2. fovea centralis, pupil, aqueous humor, lens
3. cornea, pupil, lens, vitreous humor, retina
4. cornea, fovea centralis, lens, choroid, rods
Parts A, B, C and D of the human eye are shown in the diagram. Select the option which gives correct identification along with its functions/characteristics
1. B - Blind spots - has only a few rods and cones.
2. C- Aqueous chamber - reflects the light which does not pass through the lens.
3. D- Choroid - its anterior part forms ciliary body.
4. A - retina - contains photo receptors - rods and cones.
Which of the following statements is not correct?
| 1. | An action potential in an axon does not move backward because the segment behind is in a refractory phase. |
| 2. | Depolarization of hair cells of cochlea results in the opening of the mechanically gated Potassium- ion channels. |
| 3. | Rods are very sensitive and contribute to daylight vision. |
| 4. | In the knee-jerk reflex, stimulus is the stretching of muscle and response is its contraction. |
Match the following columns and select the correct option:
| Column I | Column II | ||
| (a) | Rods and cones | (i) | Absence of Cones photoreceptor cells |
| (b) | Blind Spot | (ii) | Cones are densely packed |
| (c) | Fovea | (iii) | Photoreceptor cells |
| (d) | Iris | (iv) | Visible coloured portion of the eye |
| Options: | (a) | (b) | (c) | (d) |
| 1. | (iii) | (i) | (ii) | (iv) |
| 2. | (ii) | (iii) | (i) | (iv) |
| 3. | (iii) | (iv) | (ii) | (i) |
| 4. | (ii) | (iv) | (iii) | (i) |
Match List - I with List - II regarding sensory organs in human.
| List - I | List - II |
| (a) Organ of corti | (i) Photo receptors |
| (b) Nasal mucosa | (ii) Gustatory receptors |
| (c) Taste buds | (iii) Auditory receptors |
| (d) Retina | (iv) Olfactory receptors |
Choose the correct answer from the option given below
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (iii) | (i) |
| 2. | (iii) | (iv) | (ii) | (i) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (iii) | (i) | (ii) | (iv) |
(a) Abundant photoreceptor cells present
(b) Point is slightly above the posterior pole of the eyeball
(c) Macula lutea is present lateral to this point.
(d) It is medial to the posterior pole of the eye ball.
Choose the option which has all the correct ones from above.
1. a, b only
2. b, c only
3. a, c, d only
4. b, c, d only
| List I | List II | ||
| A. | Fovea | I | Visible coloured portion of eye that regulates diameter of pupil. |
| B. | Iris | II. | External layer of eye formed of dense connective tissue. |
| C. | Blind spot | III. | Point of greatest visual acuity or resolution. |
| D. | Sclera | IV. | Point where optic nerve leaves the eyeball and photoreceptor cells are absent. |
Choose the correct answer from the options given below:
| Options: | A | B | C | D |
| 1. | II | I | III | IV |
| 2. | III | I | IV | II |
| 3. | IV | III | II | I |
| 4. | I | IV | III | II |
© 2024 GoodEd Technologies Pvt. Ltd.