Breathing and Exchange of Gases Test 34

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Breathing and Exchange of Gases Test 34

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Question 1
1 / -0

9 cartilages among them 3 are paired and 3 are unpaired occurs in

A
Pharynx

B
Larynx

C
Glottis

D
Bronchial tube
Solution
- The larynx (voice box) is a cartilaginous box which helps in sound production.
- It consists of 9 cartilages among them 3 are paired and 3 are unpaired.
- Vocal cords are composed of twin infoldings of mucous membrane stretched horizontally across the larynx. They vibrate, modulating the flow of air being expelled from the lungs during phonation.
- Hence vocal cords occur in Larynx.
- So, the correct answer is 'Larynx'.
Question 2
1 / -0

Percentage of oxygen supplied by haemoglobin is?

A
$$97\%$$

B
$$100\%$$

C
$$49\%$$

D
$$3\%$$

Solution

A. 97%.
Solution: The percentage of oxygen supplied by haemoglobin is approx. 97 % and the rest 3% of oxygen is supplied by the plasma.
Question 3
1 / -0

Presence of large number of alveoli around alveolar ducts opening into bronchioles in mammalian lungs is?

A
Inefficient system of ventilation with little of residual air

B
Inefficient system of ventilation with high percentage of residual air

C
An efficient system of ventilation with no residual air

D
An efficient system of ventilation with little residual air
Question 4
1 / -0

Alveoli become enlarged and damaged with reduced surface area in heavy smokers. The condition is called _______.

A
Silicosis

B
Emphysema

C
Asthma

D
Bronchitis
Solution
- In emphysema, the inner walls of the lungs air sacs (alveoli) are damaged, causing them to eventually rupture. This creates one larger air space instead of many small ones and reduces the surface area available for gas exchange, causing shortness of breath. Emphysema mainly caused due to heavy smoking.
- Silicosis is a respiratory disorder caused by breathing tiny bits of silica.
- In asthma, there is an excess amount of mucus is released on the walls of the respiratory tract. It is caused due to allergic reactions.
- Bronchitis is the inflammation of the bronchi.
So, the correct option is B.
Question 5
1 / -0

Which one has the smallest diameter?

A
Right bronchus

B
Left bronchus

C
Secondary bronchiole

D
Respiratory bronchiole
Question 6
1 / -0

Percentage of oxygen being carried by blood plasma is?

A
$$6-9\%$$

B
$$3-6\%$$

C
$$2-3\%$$

D
$$1-2\%$$

Solution

Oxygen is transported in the blood in two ways: A small amount of oxygen (1-2%) Is carried in the plasma as a dissolved gas. Most oxygen (98-99%)carried in the blood is bound to the protein hemoglobin in red blood cells.
So the correct answer is option D.
Question 7
1 / -0

$$CO_2$$ concentration is?

A
More in expired air than in alveolar air

B
More in alveolar air than in expired air

C
More in inspired air than in alveolar air

D
More in inspired air than in expired air

Solution

The partial pressure of carbon dioxide in alveoli is more than the atmosphere. So the concentration of carbon dioxide is more in alveolar air than the expired air. So, the correct option is B.
Question 8
1 / -0

Amount of air inspired or expired during normal breathing is?

A
$$4.5$$lt

B
$$3.5$$lt

C
$$1.5$$lt

D
$$0.5$$lt

Solution

Tidal volume (TV) measures the amount of air that is inspired and expired during a normal breath. On average, this volume is around 500ml.
So the correct option is D.
Question 9
1 / -0

Match the columns.
Column I Column II
(a) Asthma p Recurring bronchitis
(b) Emphysema q Accumulation WBCs in alveoli
(c) Pneumonia r Allergy

A
a-r, b-p, c-q

B
a-q, b-, c-r

C
a-r, b-q, c-p

D
a-q, b-r, c-p
Question 10
1 / -0

During inspiration.

A
Diaphragm and external intercostal muscles relax

B
Diaphragm and internal intercostal muscles relax

C
Diaphragm and external intercostal muscles contract

D
Diaphragm and internal intercostal muscles contract

Solution

During inspiration the diaphragm contracts and pulls downward. At the same time, the muscles between the ribs contract and pull upward. This increases the size of the thoracic cavity and decreases the pressure inside. As a result, air rushes in and fills the lungs.
So, the correct option is C.

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Re-Attempt Weekly Quiz Competition

	Column I		Column II
(a)	Asthma	p	Recurring bronchitis
(b)	Emphysema	q	Accumulation WBCs in alveoli
(c)	Pneumonia	r	Allergy

Breathing and Exchange of Gases Test 34

Result

Breathing and Exchange of Gases Test 34

Score

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Rank

-

SHARING IS CARING

Question 1

Pharynx

Larynx

Glottis

Bronchial tube

Solution

Question 2

$$97\%$$

$$100\%$$

$$49\%$$

$$3\%$$

Solution

Question 3

Inefficient system of ventilation with little of residual air

Inefficient system of ventilation with high percentage of residual air

An efficient system of ventilation with no residual air

An efficient system of ventilation with little residual air

Question 4

Silicosis

Emphysema

Asthma

Bronchitis

Solution

Question 5

Right bronchus

Left bronchus

Secondary bronchiole

Respiratory bronchiole

Question 6

$$6-9\%$$

$$3-6\%$$

$$2-3\%$$

$$1-2\%$$

Solution

Question 7

More in expired air than in alveolar air

More in alveolar air than in expired air

More in inspired air than in alveolar air

More in inspired air than in expired air

Solution

Question 8

$$4.5$$lt

$$3.5$$lt

$$1.5$$lt

$$0.5$$lt

Solution

Question 9

a-r, b-p, c-q

a-q, b-, c-r

a-r, b-q, c-p

a-q, b-r, c-p

Question 10

Diaphragm and external intercostal muscles relax

Diaphragm and internal intercostal muscles relax

Diaphragm and external intercostal muscles contract

Diaphragm and internal intercostal muscles contract

Solution

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