Q. No.Bowman’s glands are found in:
1. olfactory epithelium
2. external auditory canal
3. cortical nephrons only
4. juxtamedullary nephrons
Which of the following statements is correct?
| 1. | Cornea consists of dense matrix of collagen and is the most sensitive portion of the eye. |
| 2. | Cornea is an external, transparent and protective proteinaceous ring of the eyeball |
| 3. | Cornea consists of dense connective tissue of elastin and can repair itself |
| 4. | The Cornea is convex, transparent layer which is highly vascularised |
Bowman's glands are located in the:
1. proximal end of uriniferous tubules
2. anterior pituitary
3. female reproductive system of cockroach
4. olfactory epithelium of our nose
Which one of the following is the correct difference between rod cells and cone cells of our retina?
| Features | Rod cells | Cone cells | |
| (a) | Visual acuity | High | Low |
| (b) | Visual pigment contained | Iodopsin | Rhodopsin |
| (c) | Overall function | Vision in poor light | Colour vision and detailed vision in bright light |
| (d) | Distribution | More concentrated in centre of retina | Evenly distributed all over retina |
1. a
2. b
3. c
4. d
Given below is a diagrammatic cross-section of a single loop of human cochlea.
Which one of the following options correctly represents the names of three different parts?
| 1. | B: Tectorial membrane C: Perilymph D: Secretory cells |
| 2. | C: Endolymph D: Sensory hair cells A: Serum |
| 3. | D: Sensory hair cells A: Endolymph B: Tectorial membrane |
| 4. | A: Perilymph B: Tectorial membrane C: Endolymph |
1. vitamin-C
2. vitamin-D
3. vitamin-A
4. vitamin-B
A person entering an empty room suddenly finds a snake right in front on opening the door. Which one of the following is likely to happen in his neurohormonal control system?
| 1. | Sympathetic nervous system activated releasing epinephrine and norepinephrine from adrenal medulla |
| 2. | Neurotransmitters diffuse rapidly across the cleft and transmit a nerve impulse |
| 3. | Hypothalamus activates the parasympathetic division of the brain |
| 4. | Sympathetic nervous system is activated releasing epinephrine and norepinephrine from the adrenal cortex |
Which part of the human ear plays no role in hearing as such but is otherwise very much required?
1. Eustachian tube
2. Organ of Corti
3. Vestibular apparatus
4. Ear ossicles
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 spot 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 the ciliary body |
| 4. | A-retina - contains photoreceptors rods and cones |
Which one of the following statements is not correct?
| 1. | Retinal is the light-absorbing portion of visual photo pigments |
| 2. | In retina, the rods have the photopigments rhodopsin while cones have three different photopigments. |
| 3. | Retinal is a derivative of Vitamin C |
| 4. | Rhodopsin is the purplish protein present in rods only. |
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