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प्रश्न
Write short notes on the following: Cochlea
उत्तर
Cochlea
Cochlea is a long, coiled outgrowth of sacculus. It is the main hearing organ. The cochlea forms three chambers.
(i) Upper − scala vestibule
(ii) Middle − scala media
(iii) Lower − scale tympani
The floor of the scala media is basilar membrane while its roof is Reissner’s membrane. Reissner’s membrane gives out a projection called tectorial membrane. The organ of corti, a hearing organ, is located on the basilar membrane. Organ of corti contains receptor hair cells. The upper scala vestibule and lower scala tympani contain perilymph
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संबंधित प्रश्न
What is the function of ear ossicles?
Sclerotic layer or choroid layer.(Which one forms the Iris ?)
The three parts of human ear contributing in hearing are-
Name the following:
The ear ossicle attached to the tympanum.
Differentiate between members of the following pair with reference to what is asked in bracket.
Semi-circular canal and cochlea (Senses perceived)
Mention, where in living organism is the following located and state their main function:
Organ of corti
Where is the Semicircular canals located? Briefly mention its function.
There are three small bones in the muddle ear – anvil, hammer and stirrup :
(a) Which of these bones is in touch with ear-drum ?
(b) Which of these bones is in touch with oval window ?
The diagram alongside represents the structure of the human ear.
(i) Write the names of the parts labelled a to g.
(ii) State briefly the functions of the parts b, d, and g.
(iii) Name the main division of the ear.
(iv) Which is the smallest bone in the human body?
(v) What is labyrinth?
Differentiate between:
The middle ear and Inner ear.
The following diagram refers to the ear of a mammal.
(i) Label the parts 1 to 10 to which the guidelines point.
(ii) Which structure:
(a) converts sound waves into mechanical vibrations?
(b) Converts vibrations into nerve impulses?
(c) Responds to change in position?
(d) Transmits impulses to the brain?
(e) Equalizes atmospheric pressure and pressure in the ear.
State the functions of the following:
Semi-circular canals
Choose the Odd One Out:
Name the three ossicles of the middle ear.
The part of the ear that turns pressure variations into electrical signals is ______.
Vibrating particles travel all the way from the vibrating objects to the ear.
State the functions of the following:
Auditory nerve
The spiral organ possessing sensory cells for hearing is ______.
Where are the following located?
Eustachian canal
