Q2 of 102 Page 130

State the functions of the following: -

(a) Semi-circular canals _____________


(b) Cochlea _____________


(c) Auditory nerve _____________

(a) These are filled with fluid and are attached to cochlea and nerves. They send information on balance and head position to the brain.


(b) Cochlea is a spiral-shaped organ of hearing which transforms sound into signals that get sent to the brain.


(c) It drains the fluid from the middle ear into the throat behind the nose.


More from this chapter

All 102 →
4

Give the reason for the following:

(i) Medicines dropped in the eye flow down into the nose ___________________


(ii) A person from bright sunlight outside enters a poorly lit room and feels blinded for a short while ___________________

 1

Categorize the following parts under

(i) External ear: _________________


(ii) Middle ear: _________________


(iii) internal ear: _________________


Eardrum, hammer, pinna, cochlea, anvil, stirrup, Eustachian tube, tympanum, oval window, semi-circular canals.

 3

Name the four fundamental tastes and the areas of the tongue which perceive them. …………………………………….

 4

Given below is a diagrammatic representation of a part of the human ear.

(i) Name the parts numbered 1-6.


(ii) Which parts of the ear shown here are complete.