Cochlea

Q.

Difference between crista and macula.

Q.

Answer the following:

(a) Which part of the ear determines the pitch of a sound?

(b) Which part of the human brain is the most developed?

(c) Which part of our central neural system acts as a master clock?

Q. The part of internal ear responsible for hearing is

1. organ of corti
2. pinna
3. ear ossicle
4. semicircular canal

Q. Given below is a diagrammatic cross section of a single loop of human cochlea:

Which one of the following options correctly represents the names of the different parts?

1. A: Tectorial membrane, B: Perilymph, C: Secretory hair cells, D: Endolymph
2. A: Endolymph, B: Secretory hair cells, C: Serum, D: Tectorial membrane
3. A: Secretory hair cells, B: Endolymph, C: Tectorial membrane, D: Perilymph
4. A: Perilymph, B: Tectorial membrane, C: Endolymph, D: Organ of Corti

Q.

While Travelling to Higher Altitudes, people can feel pain in the ear and dizziness. Which Part, among the following is involved?

1. Tympanic membrane

2. Cochlea, ear ossicles

3. Eustachian tube, utricle, saccule and semicircular canals

4. None of the above

Q. Identify ‘a; and ‘b’ in the given figure. Also choose the correct option of fluid present in ‘a’ and ‘b’.

1. a- Scala vestibuli - Perilymph
   b- Scala media - Endolymph
2. a- Scala media - Endolymph
   b- Scala tympani - Endolymph
3. a- Scala vestibuli - Perilymph
   b- Scala tympani- Perilymph
4. a- Scala media- Endolymph
   b- Scala tympani - Perilymph

Q.

Which of the following statements are correct? (i) Sound is produced by vibrations. (ii) Sound requires a medium for propagation. (iii) Light and sound both require a medium for propagation. (iv) Sound travels slower than light.

1. i & ii only

2. i, ii & iii only

3. ii, iii & iv only

4. i, ii & iv only

Q.

Which of the following parts of the human ear contribute to hearing?

1. Cochlea, ear ossicles and tympanum

2. Semicircular canals, utriculus and sacculus

3. Eustachian tube, tympanum and utriculus

4. Perilymph, ear ossicles and semicircular canals

Q. The ______ is a structure located on the basilar membrane which contains hair cells that act as ______ receptors. Choose the option that fills the blanks respectively.

1. Otolith; Auditory
2. Organ of corti; Olfactory
3. Organ of corti; Auditory
4. Otolith; Visual

Q.

The middle vascular coat darkens the eye chamber and prevents refraction by absorbing the light rays is

1. choroid

2. sclera

3. retina

4. cornea

Q.

Parts of ear concerned with static equilibrium are

Q.

ODD ONE OUT

1. Cochlea

2. hammer

3. anvil

4. stirrup

Q.

Give the location of perilymph in inner ear.

Q.

What are the membranes of the cochlea?

Q. What part of the ear is responsible for equalising pressure?

1. malleus
2. eustachian tube
3. incus
4. stapes

Q. Briefly explain the structure of ear.

Q.

Helicotrema is located

1. middle of cochlea

2. tip of cochlea
   

3. start of cochlea
   

4. near fenestra ovalis

Q.

Describe cochlea in the ear of man?

Q.

Name the part that helps to maintain equilibrium.

Q. Short Answer Question :
Give the function performed by each of the following :
(a) Ear drum :
(b) Ear ossicles :
(c) Cochlea :
(d) Semicircular canals :
(e) Cerebrum :
(f) Cerebellum :
(g) Eustachian tube

Q.

Which part of inner ear converts the pressure variations into electrical signals?

Q. Put a tick mark against the correct alternative in the following statements :
Cochlea helps in

1. Tasting
2. Hearing
3. Smelling
4. Seeing

Q. The projecting ridge in ampulla of semicircular canals in ear is called

1. Succus entericus
2. Macula
3. Otolith
4. Crista ampullaris
5. Cochlea

Q. Internal ear is filled with

1. Perilymph
2. Endolymph
3. Both (a) and (b)
4. Lymph

Q. The membranous labyrinth is concerned with

1. Hearing
2. Equilibrium
3. None of the above
4. Both A and B
   

Q. Arrangement of ear ossicles, starting from ear drum is

1. Stapes, malleus, incus
2. Malleus, incus, stapes
3. Incus, stapes, malleus
4. Stapes, incus, malleus

Q. Assertion : Ear is a sense organ of hearing.
Reason : Auditory receptors which sense the sound are present in the ear.

1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion.
2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion.
3. If the assertion is true but the reason is false.
4. If both the assertion and reason are false.

Q. Describe the internal structure of human ear with labelled diagram.

Q.

Define Cochlea

Q. Bony labyrinth of ear contains a fluid known as

1. Endolymph
2. Perilymph
3. Humor
4. Synovial fluid