Ear

Q. Which among the following statements are correct with respect to the cartilage?

1. It is soft and can be bent
2. Cartilage is flexible and stronger than the bones
3. They are absent in the joints
4. Cartilage is present in the upper part of the ear.

Q. Which of the following is not a part of the inner ear?

1. Sacculus

2. Cochlea

3. Eardrum

4. Utriculus

Q.

Structure in the ear responsible for maintaining equal pressure on both sides of the eardrum.

1. Ear ossicles

2. Auditory nerve

3. Eustachian tube

4. Auditory canal

Q.

_______equalize the air pressure on either side of the ear drum.

Q. Match the following and select the correct option.

Column I	Column II
A. Auditory canal	i. Internal ear
B. Cochlea	ii. Middle ear
C. Ear ossicles	iii. External ear

1. A)-iii); B)-i); C)-ii)
2. A)-iii); B)-ii); C)-i)
3. A)-i); B)-iii); C)-ii)
4. A)-ii); B)-iii); C)-i)

Q. Middle ear contains three tiny bones:

1. Malleus
2. Vestibule
3. Incus
4. Stapes

Q.

Which among the following is non-circulating fluid?

1. Plasma

2. Lymph

3. Tissue fluids

4. Synovial fluid

Q.

Given below are sets of five terms. Rewrite the terms in the correct sequence.

Cochlea, tympanum, pinna, auditory canal, ear ossicles

Q.

Where in the human body is the tympanum?

Q.

Mention the exact location of the following:

(c)Eustachian tube

Q. Identify 1, 2, 3 and 4 in the given image.

1. 1 - Malleus, 2 - Stapes, 3 - Incus, 4 - Tympanum
2. 1 - Malleus, 2 - Incus, 3 - Stapes, 4 - Tympanum
3. 1 - Stapes, 2 - Malleus, 3 - Incus, 4 - Tympanum
4. 1 - Malleus, 2 - Incus, 3 - Tympanum, 4 - Stapes

Q.

Match the following parts of the ear with their functions.

$\begin{array}{cc}ColumnI& ColumnII\\ i.Pinna& a.Collectssound\\ ii.Cochlea& b.Regionbetweenpinnaandeardrum\\ iii.Auditorycanal& c.Transfersvibrationstoearossicles\\ iv.Tympanicmembrane& d.Translatessoundtonerveimpulses\\ v.Eustachiantube& e.Equalisespressurebetweentheinnerandouterear\end{array}$

1. i).➡ c., ii).➡ a., iii).➡ e., iv). ➡ c, v). ➡ d.

2. i).➡ a., ii).➡ d., iii).➡ b., iv). ➡ d, v). ➡ e.

3. i).➡ e., ii).➡ c., iii).➡ b., iv). ➡ a, v). ➡ d

4. i).➡ d., ii).➡ e., iii).➡ a., iv). ➡ b, v). ➡ b.

Q. Our ears are most sensitive to sound of _________.

1. $16$ cycles/sec
2. $2000$ cycles/sec
3. $1000$ cycles/sec
4. $500$ cycles/sec

Q. Identify 1, 2, 3 and 4 in the given image.

1. 1 - Malleus, 2 - Stapes, 3 - Incus, 4 - Tympanum
2. 1 - Malleus, 2 - Incus, 3 - Stapes, 4 - Tympanum
3. 1 - Stapes, 2 - Malleus, 3 - Incus, 4 - Tympanum
4. 1 - Malleus, 2 - Incus, 3 - Tympanum, 4 - Stapes

Q.

Match the following parts of the ear with functions

$\begin{array}{cc}ColumnI& ColumnII\\ i.\text{Pinna}& a.\text{Collects vibrations in the air}\\ ii.\text{Cochlea}& b.\text{Region between pinna and eardrum}\\ iii.\text{Meatus}& c.\text{Transfers vibrations to ear ossicles}\\ iv.\text{Tympanic membrane}& d.\text{Translates sound to nerve impulses}\\ v.\text{Eustachian tube}& e.\text{Equalises pressure between the inner and outer ear}\end{array}$

1. i $\to$ a, ii $\to$ d, iii $\to$ b, iv $\to$ c, v $\to$ e

2. i $\to$ e, ii $\to$ c, iii $\to$ b, iv $\to$ a, v $\to$ d

3. i $\to$ d, ii $\to$ e, iii $\to$ a, iv $\to$ b, v $\to$ b

4. i $\to$ c, ii $\to$ a, iii $\to$ e, iv $\to$ c, v $\to$ d

Q.

Mention any one role of the eustachian tube?

Q.

Where is the organ of corti located?

Q. Identify 1, 2, 3 and 4 in the given image.

1. 1 - Malleus, 2 - Stapes, 3 - Incus, 4 - Tympanum
2. 1 - Malleus, 2 - Incus, 3 - Stapes, 4 - Tympanum
3. 1 - Stapes, 2 - Malleus, 3 - Incus, 4 - Tympanum
4. 1 - Malleus, 2 - Incus, 3 - Tympanum, 4 - Stapes

Q. Is vasa efferentia and vas deferens same?

Q. Assertion :Ear muscles of the external ear in man are poorly developed. Reason: These muscles are useful which move external ear freely to detect sound efficiently.

1. Both assertion and reason are correct and reason is the correct explanation for assertion.
2. Both assertion and reason are correct but reason is not the correct explanation for assertion.
3. Assertion is correct but reason is incorrect.
4. Assertion is incorrect but reason is correct.

Q. What is the role of the eustachian tube in the ear?

Q. <!--br {mso-data-placement:same-cell;}--> Multicellular organisms exhibit division of labour. Comment.

Q. Which part of the human ear converts pressure variations into electrical signals?

1. Cochlea
2. Eustachian tube
3. Auditory nerve
4. Ear drum

Q.

Write the audible range of frequency.

Q.

State the main function of the following:

Eustachian tube

Q. Oval window, Tympanum, Cochlea, Auditory canal, Ear ossicles (path through which a vibration of sound is transferred in the human ear).

Q.

Ear is most sensitive to

1. 10, 000 cycles/sec

2. 1, 000 cycles/sec

3. 100 cycles/sec

4. 500 cycles/sec

Q. Otolith (otoconia) are CaCO${}_3$ particles found in the

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

Q. The human ear is equipped to register sounds of frequencies between

1. 1000 to 2000 cycles per second
2. 20 to 20, 000 cycles per second
3. 5000 to 7000 cycles per second
4. 5000 to 10, 000 cycles per second
5. 10, 000 to 20, 000 cycles per second

Q. Identify the sequence in which the sound vibrations reach the brain:
$\begin{array}{cc}\text{Parts}& \text{Function}\\ \left(a\right)\text{External ear}& \left(i\right)\text{Amplifies the vibrations received on the tympanic membrane.}\\ \left(b\right)\text{Middle Ear}& \left(ii\right)\text{Converts the vibrations into nerve impulses and sends them to brain.}\\ \left(c\right)\text{Inner Ear}& \left(iii\right)\text{Directs the sound waves towards the tympanic membrane.}\end{array}$

1. a-i, b-iii, c-ii
2. a-iii, b-i, c-ii
3. a-ii, b-iii, c-i
4. a-ii, b-i, c-iii