Advertisements
Advertisements
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
APPEARS IN
संबंधित प्रश्न
Which part of our body helps us in maintaining the body balance?
Photoreceptor cells are present in __________.
(A) blind spot
(B) retina
(C) cochlea
(D) cornea
The number of oscillations per second of a vibrating object is called its time period.
The unit of frequency is ______.
State the exact location of the Ciliary body
Differentiate between the Rods and Cones of Retina (Type of pigment)
Differentiate between Near vision and Distant vision (shape of the eye lens)
Differentiate between members of the following pair with reference to what is asked in bracket.
Semi-circular canal and cochlea (Senses perceived)
State whether the following statements are true (T) or false (F). If false, correct them by changing any one single word in each.
Deafness is caused due to rupturing of the pinna.
Where is the Semicircular canals located? Briefly mention its function.
Where is the Utriculus located? Briefly mention its function.
Draw a labelled diagram of the inner ear.
Name the following:
Part of internal ear related to balance.
Choose the correct answer.
Labyrinth is a part of ____________
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
The range of audible frequency for the human ear is
Select the option with incorrect identification:
Where are the following located?
Eustachian canal
With reference to human ear answer the question that follow:
Name the part of the ear associated with the amplification of vibrations.
