- a person is wearing spectacles with concave lenses for
correcting vision. While not using the glasses, the image
of a distant object in his case will be formed
(a) on the blind spot (b) behind the retina
(c) in front of the retina (d) on the yellow spot. - The gelatinous membrane covering the sensory hair cells
of the ear is known as
(a) reissner’s membrane
(b) tectorial membrane
(c) basilar membrane
(d) neuro-sensory membrane. - retina is most sensitive at
(a) macula lutea (b) optic disc
(c) fovea centralis (d) periphery. - Scala tympani is connected with scala vestibuli by means
of
(a) helicotrema (b) fibrillar membrane
(c) stapes (d) basilar membrane. - cornea is covered externally by a thin transparent
membrane which is called
(a) sclerotic (b) conjunctiva
(c) choroid (d) none of these. - The dark pigment in the eye, which reduces the internal
reflection is
(a) choroid (b) iris
(c) sclerotic (d) cornea. - The vibrations of the tympanic membrane are amplified
approximately ____ times in the oval window.
(a) 5 (b) 20
(c) 40 (d) 55
20. a diagram of ear is given here. Identify the parts a to h
and select the correct option.
(a) a – Temporal bone, B – malleus, c – Incus,
D – Stapes, E – cochlea, F – Eustachian tube,
G – Tympanic membrane, h – External auditory canal
(b) a – Tympanic membrane, B – malleus, c – Incus,
D – Stapes, E – cochlea, F– Eustachian tube,
G – Temporal bone, h – External auditory canal
(c) a– Tympanic membrane, B – Incus, c – malleus,
D – Stapes, E – cochlea, F – Eustachian tube,
G – Temporal bone, h – External auditory canal
(d) a – Temporal bone, B – malleus, c – Incus,
D – cochlea, E – Stapes, F – Eustachian tube,
G – Tympanic membrane, h – External auditory canalAnswer Key
- (c) 2. (d) 3. (b) 4. (d) 5. (a)
- (a) 7. (a) 8. (a) 9. (b) 10. (c)
- (d) 12. (a) 13. (c) 14. (b) 15. (c)
- (a) 17. (b) 18. (a) 19. (b) 20. (a)
nn