71.
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?
A
$$B:$$ Tectorial membrane, $$C:$$ Perilymph, $$D:$$ Secretory cells
B
$$C:$$ Endolymph, $$D:$$ Sensory hair cells, $$A:$$ Serum
C
$$D:$$ Sensory hair cells, $$A:$$ Endolymph, $$B:$$ Tectorial membrane
D
$$A:$$ Perilymph, $$B:$$ Tectorial membrane, $$C:$$ Endolymph
Answer :
$$A:$$ Perilymph, $$B:$$ Tectorial membrane, $$C:$$ Endolymph
72. Hyalocytes cells occurs in
A
Aqueous humor
B
Vitreous humor
C
A and B both
D
None of the above
Answer :
Vitreous humor
73. What is the cause of stereoscopic vision in human
A
Refraction power of eye is high
B
Well developed retina
C
High developed cerebral cortex
D
Presence of biconvex lens
Answer :
High developed cerebral cortex
74.
Which one of the following is the correct difference between Rod Cells and Cone Cells of our retina?
Rod Cells
Cone Cells
a.
Visual acuity:
High
Low
b.
Visual pigment contained:
Iodops
in Rhodpsin
c.
Overall function:
Vision in poor light
Colour vision and detailed vision in bright light
d.
Distribution:
More concentrated in retina
Evenly distributed all over
A
a
B
b
C
c
D
d
Answer :
c
76. Astigmatism is developed when
A
Lens become opaque
B
Curvature of conjunctiva is changed
C
Lens become nonflexible
D
Curvature of cornea is changed
Answer :
Curvature of cornea is changed
77. In old age farsightedness is a defect of eye in man in which
A
Eye ball becomes short
B
Eye ball becomes elongated
C
Lens become more concave
D
Lens become more spherical
Answer :
Lens become more concave
78. The eye defect, Astigmatism can be corrected by using
A
Convex lens
B
Concave lens
C
Cylindrical lens
D
Surgery
Answer :
Cylindrical lens
79. Trachoma disease is due to infection of bacteria
A
Chlamdia trachomastis
B
Bassilus
C
E. Coli
D
Salmonella
Answer :
Chlamdia trachomastis
80. No image formation occurs on blind-spot of retina because
A
It is not present of the optical axis of the eye
B
Here cones and rods are absent
C
On this part only cones are present
D
The nerve fibers of this region do not contribute in the formation of optic chiasma
Answer :
Here cones and rods are absent