Biology
State the functions of the following :-
(i) Semi-circular canals
(ii) Cochlea
(iii) Auditory nerve
Answer
(i) Semi-circular canals
- Dynamic Equilibrium
- Detects head rotation
(ii) Cochlea
- Contains organ of corti which plays role in hearing.
- Converts sound vibrations into electrical signals and transmits it to the brain via the auditory nerve.
(iii) Auditory nerve
- Transmits auditory signals from ear to brain.
Related Questions
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.
Categorise the following parts under
(i) external (ii) middle (iii) internal ear.
Ear drum, hammer, pinna, cochlea, anvil, stirrup, eustachian tube, tympanum, oval window, semi-circular canals.
Mention if the following statements are true (T) or false (F) :
(i) Human ear is concerned with hearing only.
(iii) Pinna concentrates and directs sound waves towards tympanum.
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.
