External & Middle Ear

Q.

Discuss the functions of human ear.

Q. Which part of the human ear plays no role in hearing as such but is otherwise very much required?

1. Vestibular apparatus
2. Ear ossicles
3. Organ of corti
4. Eustachian tube

Q.

Name the three ear ossicles. How do they contribute in the mechanism of hearing?

Q. Which of these fluids fill the inner ear?

1. Perilymph
2. Aqueous humour
3. Vitreous humour
4. Endolymph

Q.

___ helps in equalizing the pressures on either sides of the ear drum.

1. Oval window

2. Tympanic membrane

3. Eustachian tube

4. Pinna

Q.

Which of the following ear ossicle is attached to the tympanum?

1. External ear

2. Tympanum

3. Inner ear

4. Middle ear

Q.

Collective name for the bones of the middle ear.

1. Fenestra ovalis

2. Ear ossicles

3. Vestibule

4. Cerumen

Q.

Which is the smallest bone in the body, which is found in the ear?

1. Stirrup

2. Temporal bone

3. Hammer

4. Anvil

Q.

The eustachian tube connects the cavity of the middle ear with the throat.

1. True

2. False

Q.

What is the structure in the ear that help convert the mechanical vibration into electrical impulses?

Q.

The organ in ear that helps to maintain equilibrium is

1. Cochlea

2. Organ of Corti

3. Semicircular canals

4. Ear ossicles

Q.

What is the working of the ear?

Q.

Structure that converts sound waves into mechanical vibrations.

1. Tympanum

2. Ear ossicles

3. Organ of corti

4. Oval window

Q.

The significance of hair and wax in auditory canal is

1. maintainence of moisture in the ear

2. prevention of the entry of foreign particles

3. Prevention of the entry of small insects

4. Maintenance of body balance

Q.

How is sound produced by beating a drum?

Q.

Mention if the following statements are true (T) or false (F). Give reason.
(a) Sometimes medicines dropped into the eyes come into the nose and even throat. (T/F)
(b) Ciliary muscles regulate the size of the pupil. (T/F)

(c) The yellow spot of the retina is the region of colour vision. (T/F)
(d) The auditory nerve is purely for perceiving sound. (T/F)
(e) Malleus, incus and stapes are collectively called the ear ossicles. (T/F)
(f) Flavour and taste are one and the same thing. (T/F)
(g) Short-sightedness and hyperopia are one and the same thing. (T/F)
(h) The blind spot is called so because no image is formed on it. (T/F)

Q.

Given below are sets of five terms each. Rewrite the terms in correct order in a logical sequence.

Cochlea, Malleus, Pinna, Stapes, Incus

Q. The contraction of pupil of the eye in the presence of bright light is an example of:​

1. Spinal reflex​
2. Adrenal reflex​
3. Voluntary reflex​
4. Cerebral reflex​

Q.

Oval window: middle ear :: Semicircular canal: ________

1. eustachian tube

2. inner ear

3. external ear

4. cochlea

Q.

Which of the following is not the function of the auditory canal?

1. Prevents entry of dust and foreign particles

2. Kills microorganisms by trapping them in wax

3. Carries sound waves to tympanum

4. Connects middle ear and pharynx

Q.

Which of the following is a function of the eustachian tube?

1. Vestibule

2. Utriculus

3. Sacculus

4. All of these

Q.

Give scientific reasons for the following statements:

Throat infections can lead to ear infections

Q. 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?
Figure

Q.

Does the ear consist of a sound conducting mechanism only?

Q. In which of the following segments you find cephalic region?

Q.

Amplification and transmission of the vibrations received by tympanum into the inner ear are done by:

1. Eustachian tube

2. Ear ossicles

3. Perilymph

4. Cochlea

Q.

What substance do the ceruminous glands lining the auditory glands produce?

1. Saliva

2. Mucus

3. Enzymes

4. Wax

Q.

Give biological reason for the following:

Throat infection can lead to ear infections

Q.

Which is the smallest bone in the human body?

1. Incus, malleus, stapes

2. Malleus, incus, stapes

3. Stapes, malleus, incus

4. Stapes, incus, malleus

Q.

The waxy substance which coats the surface of the auditory canal is produced by

1. Ceruminous glands

2. Zeis glands

3. Parotid glands

4. Meibomian glands