Breathing and Exchange of Gases Test 55

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Breathing and Exchange of Gases Test 55

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Weekly Quiz Competition

Question 1
1 / -0

The alveoli contain specialized cells that secrete a phospholipoprotein complex known as pulmonary surfactant. The function of pulmonary surfactant is ________________________.

A
to provide some rigidity to the alveoli to prevent lung collapse

B
to decrease the surface tension of the alveoli, making it easier to expand them

C
to facilitate the diffusion of $$O_2$$ and $$CO_2$$ by providing protein channels through which these gases flow

D
to provide a sticky surface upon which dust and microbes are trapped and disposed of

Solution

Alveoli is the region in the lungs where exchange of gases takes place.According to histology of alveolar wall ,it contain 2types of cell
I.e. 1-Type-1 cell
2.Type -2 cell which secret DPPP(DIPAMITOYL PHOSPHATIDOYL CHOLINE OR LECITHINE) which acts as a surfactant and help in preventing collapsing of lungs.
Question 2
1 / -0

The resting tidal volume to vital capacity ratio should be :

A
$$1:5$$

B
$$1:9$$

C
$$1:20$$

D
$$1:40$$
Question 3
1 / -0

A
A-Bronchus, B-Bronchioles, C-Larynx, D-Trachea

B
A-Bronchiole, B-Bronchus, C-Larynx, D-Trachea

C
A-Larynx, B-Trachea, C-Bronchus, D-Bronchiole

D
A-Trachea, B-Bronchus, C-Bronchiole, D-Larynx

Solution

The lungs begin at the bottom of our trachea(the windpipe). The trachea is the tube that carries the air in and out of the lungs. Each lung has a tube called bronchus that connects to trachea. The bronchi branch off into smaller bronchi and even smaller tubes called bronchioles.
Larynx commonly called "voice box' is an organ in the top of the neck involved in breathing, producing sound and protecting trachea against food aspiration.
So, option D is the correct option.
Question 4
1 / -0

$$1$$ litre of oxygenated blood can deliver how much amount of $$O_2$$ to the tissue under normal conditions?

A
$$4$$ ml

B
$$50$$ ml

C
$$20$$ ml

D
$$159$$ ml

Solution

Every 100 ml of oxygenated blood can deliver around 5 ml of $$O_2$$ to tissues under normal physiological conditions.
1 litre = 1000ml
So, 100 ml = 5ml
1000ml = 50ml
So, the correct answer is B.
Question 5
1 / -0

Inspiratory Reserve Volume(IRV) is ________.

A
$$500$$ml

B
$$2500-3000$$ml

C
$$1100$$ml

D
$$4500-5000$$ml

Solution

B. 2500-3000 ml
Reason: Respiratory volume is the volume of air which our lung can hold or release under certain different condition. There are four standard lung volumes. Those are Tidal Volume (TV), Inspiratory Reserve Volume (IRV), Expiratory Reserve Volume (ERV) and Residual Volume (RV). Among them, inspiratory reserve volume is the extra amount of air a healthy person can inspire forcefully. This volume can be 2500-3000 ml in average. So the correct option is B.
Question 6
1 / -0

Which of the following is an occupational respiratory disorder?

A
Anthracis

B
Silicosis

C
Botulism

D
Emphysema

Solution

An occupational respiratory disorder is the lung diseases that include dust of the environment. These are work-related conditions that had been caused by materials a person is exposed to within a workplace.
So, the correct option is 'Silicosis'
Question 7
1 / -0

In case of emphysema, _________.

A
The bronchioles are found damaged

B
The alveolar walls are found damaged

C
The plasms membrane is found damaged

D
The respiratory muscles are found damaged
Question 8
1 / -0

Which of the following is an occupational lungs disease?

A
Silicosis

B
Asbestosis

C
Minamata

D
Both A and B
Question 9
1 / -0

A person remaining a high altitudes for years becomes more and more acclimatized to the low $$pO_2$$ by the following except.

A
Increased pulmonary ventilation

B
Increased in RBCs and haemoglobin concentration

C
Polycythaemia

D
Increased cardiac output permanently
Question 10
1 / -0

Observe the picture and choose the correctly labeled parts:

A
A: Pulmonary circulation; C: Pulmonary vein

B
B: Pulmonary circulation; D: Pulmonary artery

C
D: Pulmonary artery; C: Aorta

D
C: Pulmonary vein; B: Pulmonary circulation

Solution

The pulmonary circulation is the portion of the circulatory system which carries deoxygenated blood away from the right ventricle, to the lungs, and returns oxygenated blood to the left atrium and ventricle of the heart.
The pulmonary veins are the veins that transfers oxygenated blood from the lungs to the heart.
So, option A is the correct option.

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Breathing and Exchange of Gases Test 55

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Breathing and Exchange of Gases Test 55

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Question 1

to provide some rigidity to the alveoli to prevent lung collapse

to decrease the surface tension of the alveoli, making it easier to expand them

to facilitate the diffusion of $$O_2$$ and $$CO_2$$ by providing protein channels through which these gases flow

to provide a sticky surface upon which dust and microbes are trapped and disposed of

Solution

Question 2

$$1:5$$

$$1:9$$

$$1:20$$

$$1:40$$

Question 3

A-Bronchus, B-Bronchioles, C-Larynx, D-Trachea

A-Bronchiole, B-Bronchus, C-Larynx, D-Trachea

A-Larynx, B-Trachea, C-Bronchus, D-Bronchiole

A-Trachea, B-Bronchus, C-Bronchiole, D-Larynx

Solution

Question 4

$$4$$ ml

$$50$$ ml

$$20$$ ml

$$159$$ ml

Solution

Question 5

$$500$$ml

$$2500-3000$$ml

$$1100$$ml

$$4500-5000$$ml

Solution

Question 6

Anthracis

Silicosis

Botulism

Emphysema

Solution

Question 7

The bronchioles are found damaged

The alveolar walls are found damaged

The plasms membrane is found damaged

The respiratory muscles are found damaged

Question 8

Silicosis

Asbestosis

Minamata

Both A and B

Question 9

Increased pulmonary ventilation

Increased in RBCs and haemoglobin concentration

Polycythaemia

Increased cardiac output permanently

Question 10

A: Pulmonary circulation; C: Pulmonary vein

B: Pulmonary circulation; D: Pulmonary artery

D: Pulmonary artery; C: Aorta

C: Pulmonary vein; B: Pulmonary circulation

Solution

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