Biology
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.
Related Questions
The spiral organ possessing sensory cells for hearing is:
- Ampulla
- Semicircular Canal
- Vestibule
- Organ of Corti
Which of the following structures equalises the air pressure on either side of the tympanum ?
- Auditory tube
- Eustachian tube
- Vestibular canal
- Tympanic canal
Note the relationship between the first two words and suggest the suitable word/words for the fourth place.
(a) Cones : Iodopsin :: Rods: …………… .
(b) Eyes : Photoreceptors :: Ears : …………… .
(c) Ears : Auditory nerve :: Eyes : …………… .
(d) Ear pinna : Auricle :: Inner ear : …………… .
(e) Semi-circular canal : Ampulla :: Cochlea : …………… .
Match the terms in column I with those in column II and write down the matching pairs.
Column I Column II Conjunctiva Viral infection Cornea Ciliary body Choroid Spiral-shaped Cochlea Transparent epithelium Conjunctivitis Suspensory ligament Contains melanin Transparent but appears black