Parts of the External Ear

Q.

Briefly answer the following questions:

What is the function of ear ossicles?

Q.

Draw labelled diagrams of the following :

(a) Neuron (b) Brain (c) Eye (d) Ear

Q.

Name the part of the ear associated with:

1. Static balance
2. Hearing
3. Dynamic balance

Q.

What is a pinna?

Q.

State the function of pinna.

Q.

What do you mean by ear ossicles?

Q.

Differentiate between audible and inaudible sounds

Q.

Whats the correct prefix for the word “Audible ?"

Q.

Mention the exact location of the following

Semicircular canals

Q.

With reference to the human ear, answer the question that follows:

(i) Give the technical term for the structure found in the inner ear.

(ii) Name the three small bones present in the middle ear. What is the biological term for them collectively?

(iii) Name the part of the ear, associated with (1) static balance (2) hearing (3) dynamic balance.

(iv) Name the nerve which transmits messages from the ear to the brain.

Q.

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

1. Parotid glands

2. Meibomian glands

3. Ceruminous glands

4. Zeis glands

Q. In amphibians and reptiles, the ear is represented by

Q.

How do we hear the sound?

Q.

"The older a person becomes, the greater is the range of frequency." Is this statement incorrect? If yes, then correct it?

Q. Cochlea, Malleus, Pinna, Stapes, Incus.

Q. Match column I with column II and select the correct option from the given codes.

Column I	Column II
A. Pinna	(i) Collects vibrations in the air which produces sound
B. Ear canal	(ii) Passage for sound wave from pinna to ear drum
C. Tympanic membrane	(iii) Transfers sound wave to ear ossicles
D. Ear ossicles	(iv) Increases the efficiency of transmission of sound waves to the inner ear
E. Cochlea	(v) Has hearing receptors
F. Eustachian tube	(vi) Equalises the pressure on both sides of ear drum
G. Auditory nerves	(vii) Impulse transfer from organ of Corti to auditory cortex in temporal lobe of cerebrum

1. A - (i), B - (ii), C - (iii), D - (iv), E - (v), F - (vi), G - (vii)
2. A - (vii), B - (vi), C - (v), D - (iv), E - (iii), F - (ii), G - (i)
3. A - (i), B - (ii), C - (iv), D - (iii), E - (v), F - (vi), G - (vii)
4. A - (i), B - (ii), C - (iii), D - (iv), E - (v), F - (vii), G - (vi)

Q.

______ of our ear is shaped like a snail.

Q. Choose the wrong statements with reference to human inner ear.
(a) Bony labyrinth divides into two areas namely cochlea and vestibule
(b) Scala vestibuli and scale media are separated by a membrane called Reissner's membrane
(c) Scala media and scala tympani are separated by basilar membrane
(d) Scala vestibuli and scala tympani are filled with endolymph.

1. a and c
2. a and d
3. a and b
4. b and c

Q. The structure in the internal ear which resembles a "snail shell" is called as

1. Organ of Corti
2. Membranous labirynth
3. Cochlea
4. Ear ossicles

Q.

The nerve impulse for hearing originates from:

1. Ear drum

2. Ear ossicles

3. Auditory nerve

4. Cochlea

Q.

Draw labelled diagrams of the following:

(a) Neuron (b) Brain (c) Eye (d) Ear

Q.

Give the exact location and one function of Malleus

Q. Between malleus and incus, the joint found is

1. Incudomalleolar joint
2. Gliding joint
3. None of the above
4. Pivot joint

Q. Sound moves through an ear when pressure waves in the .......... cause vibrations of the .......... membrane.

Q. Which of the following is a part of middle ear?

1. Cochlea
2. Utriculus
3. Sacculus
4. Malleus

Q. Which is part of human brain

1. Corpora alata
2. Corpora bigemina
3. Corpora adiposa
4. Corpora quadrigemina

Q. With reference to the human ear, answer the questions.
(a) Give the technical term for the structures found in the inner ear.
(b) Name the three small bones present in the middle ear. What is the biological tam for them collectively?
(c) Name the part of the ear associated with (1) static balance (2) heating (3) dynamic balance.
(d) Name the nerve, which transmits messages from the ear to the brain.

Q.

In the following set of term given below, there is an odd one and cannot be grouped in the same category to which the other three belong. Identify the odd term and name the category to which the remaining three belong.

Example: Ovary, Fallopian tube, Ureter, Uterus

Odd term: Ureter

Category: Parts of female reproductive system

1. Malleus, Iris, Stapes, Incus.

Q. The external ears of mammals

1. Are also called pinnae
2. Are absent in monotremes
3. Can be moved in various direction by many mammals
4. All of the above

Q.

The statement given below are incorrect. Rewrite the correct statement by changing the underlined words of the statements.

(a) Deafness is caused due to the rupturing of the pinna.