Breathing and Exchange of Gases Test -1

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Breathing and Exchange of Gases Test -1

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Weekly Quiz Competition

Question 1
1 / -0

Which part of our respiratory system doesn’t need ciliated epithelium and thus have non-ciliated walls ?

A
trachea

B
nasal chamber

C
bronchioles

D
alveoli

Solution

Explanation:

Respiratory system does not need ciliated epithelium and thus have non-ciliated walls such as alveoli. Alveoli are the balloon like structure at which exchange of gases takes place.
Question 2
1 / -0

Those bronchioles which divide into alveolar ducts are called as :

A
Tertiary bronchioles

B
Primary bronchioles

C
Respiratory bronchioles

D
Secondary bronchioles

Solution

Explanation:

Terminal bronchioles give rise to respiratory bronchioles that ultimately lead to the alveoli. Exchange of gases takes place in alveoli with blood veseels.
Question 3
1 / -0

The correct sequence of respiration is i) Breathing in oxygen ii) Transportation of gases by the blood iii) Diffusion of gases between blood and tissues iv) Diffusion of gases across alveolar membrane v) Using of oxygen and releasing of carbondioxide

A
i), iv), ii), iii), v)

B
i), ii), iv), iii)

C
i), iii), iv), ii), v)

D
i), ii), iii), iv), v)

Solution

Explanation:

Respiration involves breathing or pulmonary ventilation by which atmospheric air is drawn in, Diffusion of gases across alveolar membrane, Transport of gases by the blood, Diffusion of gases between blood and tissues.Utilisation of oxygen by the cells.
Question 4
1 / -0

If TLC is 5500ml, IRV is 2950ml, ERV is 900ml and TV is 500ml then what will be value of RV ?

A
1150ml

B
2550ml

C
1200ml

D
1100ml

Solution

Explanation:

RV = TLC - IRV – ERV– TV.

substitute the values

RV = 5500-2950-900-500= 1150ml.
Question 5
1 / -0

Respiration in insects is direct due to exchange of gases

A
Directly with the air outside through body surface

B
Directly with the air in tubes

C
Directly with coelomic fluid

D
By tracheal tubes directly with haemocoel which then exchange with tissues.

Solution

Explanation:

Insects have spiracles on their exoskeletons to allow air to enter the trachea. In insects, the tracheal tubes primarily deliver oxygen directly into the insects' tissues. The spiracles can be opened and closed in an efficient manner to reduce water loss. This is done by contracting closer muscles surrounding the spiracle.
Question 6
1 / -0

Which one of the following is wrong statement with respect to the functions of respiratory system?

A
Cleans up the air

B
Humidifies the air

C
Warms up the air

D
Diffusion of gases

Solution

Explanation:

The function of respiratory system does not deal with the cleaning up of the air.
Question 7
1 / -0

Ram suffers punctures in his chest cavity without any damage to the lungs in an accident. It results in

A
Reduction in breathing rate

B
Cessation of breathing

C
Rapid increase in breathing rate

D
No effect in breathing

Solution

Explanation:

haemopneumothorax, is a medical term describing the combination of two conditions: pneumothorax, or air in the chest cavity, and hemothorax (also called hæmothorax), or blood in the chest cavity. A hemothorax, pneumothorax or both can occur if the chest wall is punctured.

Becauseof punctured chest wall, the lungs cannot expand, the pressure in the lungs never drops and no air is pulled into the bronchi. Respiration is not possible.
Question 8
1 / -0

The exposure of carbon monoxide to animals

A
Reduces carbon dioxide transport

B
Reduces oxygen transport

C
Increases carbon dioxide transport

D
Destroys haemoglobin

Solution

Explanation:

The toxicity in animals is caused by the extraordinary affinity of carbon monoxide for haemoglobin which is responsible for the oxygen transport (approx. 250 times greater affinity of carbon monoxide compared to oxygen.because of higher affinity it destroys the haemoglobin.
Question 9
1 / -0

Pharynx is the common passage for food and air but still food do not enter into the windpipe due to the presence of

A
Frenulum

B
valve of windpipe

C
Epiglottis

D
Glottis

Solution

Explanation:

The epiglottis is a leaf-shaped flap of cartilage located behind the tongue, at the top of the larynx, or voice box. The main function of the epiglottis is to seal off the windpipe during eating, so that food is not accidentally inhaled.
Question 10
1 / -0

Skin is the only respiratory organ in :

A
Ranatigrina

B
Peripatus

C
larvae of mosquitoes

D
Hirudinaria granulosa

Solution

Explanation:

There are no special respiratory organs in Hirudinaria. In addition to its primary role of a protective covering, the skin also serves a respiratory function. It is provided with a rich supply of haemocoelomic fluid in an extensive system of capillaries and capillary loops, which penetrate into the spaces between the inner ends of the epidermal cells.
Question 11
1 / -0

At the time of inspiration, the diaphragm.

A
Expands

B
Contracts

C
Relaxes

D
Does not undergo any change

Solution

Upon inhalation, the diaphragm contracts and flattens and the chest cavity enlarges. This contraction creates a vacuum, which pulls air into the lungs. Hence, Option B is correct.
Question 12
1 / -0

Respiratory organs of Cockroach are called

A
Maxillae

B
Spiracles

C
Mandibles

D
Labrum

Solution

The atmospheric air in cockroach enters and escapes out from the system through ten pairs of slit-like apertures called stigmata or spiracles. These are located on either lateral sides of the body. Two pairs of spiracles are thoracic and eight pairs are abdominal.
So, the correct answer is 'Spiracles'.
Question 13
1 / -0

What is dead space air?

A
Air in the alveoli

B
Air in the lungs

C
Air in the pharynx

D
Air in the trachea and bronchi
Solution
- Some amount of air remains behind in the various parts of the respiratory tract.
- The air in the trachea and bronchi (where no diffusion occurs) is called dead space air.
- The air remaining in the alveoli or air sacs in alveolar air. The maximum volume of air that can be exchanged in one breath in and out is called the vital capacity. It is about 5000 ml.
Therefore, the correct answer is option D.
Question 14
1 / -0

The respiratory organs in aquatic whale are

A
Gills

B
Lungs

C
Trachea

D
Skin

Solution

Whales cannot breathe underwater because they are mammals and not fish. This means that their breathing organs are lungs, rather than gills. So, like humans, whales need to come to the surface to take a deep breath of fresh air and when they are underwater they hold their breath.

So, The correct option is 'Lungs'.
Question 15
1 / -0

Lungs are an important organ for excretion of

A
Water.

B
Urea.

C
Oxygen.

D
Carbon dioxide.

Solution

Lungs are the respiratory organ, they help in removal of carbon dioxide from our body through the air that we respire. Carbon dioxide is formed during oxidation of food. It is the waste product and of no use of our body. It is carried out to the lungs by blood. So, it may also be considered as an organ that is involved in excretion. Thus, the correct option is D.
Question 16
1 / -0

Where does gaseous exchange take place during respiration in a human being?

A
Bronchi

B
Pharynx

C
Larophaynx

D
Trachea

Solution

At the same time, carbon dioxide (CO2) is transmitted from the blood capillaries into the alveoli and then expelled through the bronchi and the upper respiratory tract. The inner surface of the lungs where the exchange of gases takes place is very large, due to the structure of the air sacs of the alveoli.
So, the correct option is 'Bronchi'.
Question 17
1 / -0

The inspiratory reserve volume is also known as

A
Supplemental air

B
Inhaled air

C
Complemental air

D
All of the above

Solution

During one breath in and out, the volume of gas exchanged is called the tidal volume. It is about 450ml during quiet breathing. The volume of air that can be drawn in after normal inspiration is about 1500 ml and is called as the inspiratory reserve volume (IRV) or complemental air.
Therefore, the correct answer is option C.
Question 18
1 / -0

In aerobic respiration which of the following is a reactant?

A
$$CO_2$$

B
$$O_2$$

C
$$H_2O$$

D
Fructose

Solution

The oxidative breakdown of glucose with the help of atmospheric oxygen is known as aerobic respiration. It involves the complete breakdown of glucose into carbon dioxide and water releasing energy.
Thus, the correct answer is option B.
Question 19
1 / -0

Alveoli are present in

A
Lungs.

B
Kidney.

C
Liver.

D
Brain.

Solution

Lung alveoli are present in the lungs. They are branching from either alveolar sacs or alveolar ducts. Gaseous exchange of oxygen and carbon dioxide takes place in the alveoli. Oxygen which is inhaled from the air diffuses from the walls of the alveoli and enters the adjacent capillaries into the red blood cells. The oxygen is then carried by the blood to the body tissues. Similarly, carbon dioxide diffuses into the wall of the alveoli and is exhaled out.
Thus, the correct answer is option A.
Question 20
1 / -0

In which of the following way does the maximum amount of $$CO_2$$ is transported in the blood?

A
Bicarbonate form

B
Dissolved form

C
Carbaminohemoglobin

D
Chloride shift

Solution

20 to 25 % of carbon dioxide is carried as carbamino-haemoglobin.
Around 70 to 80% of carbon dioxide is transported as sodium bicarbonate at the tissue level and transported to the alveoli is released out as carbon dioxide.
Every 100 ml blood contains 4 ml carbon dioxide in dissolved form.
So the correct option is 'Bicarbonate form'

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Breathing and Exchange of Gases Test -1

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Breathing and Exchange of Gases Test -1

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Question 1

trachea

nasal chamber

bronchioles

alveoli

Solution

Question 2

Tertiary bronchioles

Primary bronchioles

Respiratory bronchioles

Secondary bronchioles

Solution

Question 3

i), iv), ii), iii), v)

i), ii), iv), iii)

i), iii), iv), ii), v)

i), ii), iii), iv), v)

Solution

Question 4

1150ml

2550ml

1200ml

1100ml

Solution

Question 5

Directly with the air outside through body surface

Directly with the air in tubes

Directly with coelomic fluid

By tracheal tubes directly with haemocoel which then exchange with tissues.

Solution

Question 6

Cleans up the air

Humidifies the air

Warms up the air

Diffusion of gases

Solution

Question 7

Reduction in breathing rate

Cessation of breathing

Rapid increase in breathing rate

No effect in breathing

Solution

Question 8

Reduces carbon dioxide transport

Reduces oxygen transport

Increases carbon dioxide transport

Destroys haemoglobin

Solution

Question 9

Frenulum

valve of windpipe

Epiglottis

Glottis

Solution

Question 10

Ranatigrina

Peripatus

larvae of mosquitoes

Hirudinaria granulosa

Solution

Question 11

Expands

Contracts

Relaxes

Does not undergo any change

Solution

Question 12

Maxillae

Spiracles

Mandibles

Labrum

Solution