The thin, transparent extension of sclerotic layer found in front of the lens is:

1. Cornea
2. Cochlea
3. Conjunctiva
4. Choroid

The part of the inner ear which is responsible for hearing is :

1. Semicircular canal
2. Utriculus
3. Cochlea
4. Sacculus

Which of the following structures equalises the air pressure on either side of the tympanum ?

1. Auditory tube
2. Eustachian tube
3. Vestibular canal
4. Tympanic canal

Name the following:

(a) The photosensitive pigment present in the rods of the retina.

(b) The part which equalizes the air pressure in the middle and external ear.

(c) The ear ossicle attached to the tympanum.

(d) The tube which connects the cavity of the middle ear with the throat.

(e) The part of the eye responsible for its shape.

(f) The nerves which transmit impulse from ear to the brain.

(g) The photoreceptors found in the retina of the eye.

(h) The eye defect caused due to shortening of the eye ball from front to back.