Breathing and Exchange of Gases Test 50

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Breathing and Exchange of Gases Test 50

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following symptom is associated with disease emphysema?

A
Widening of alveoli

B
Widening of bronchi

C
Constriction of alveoli

D
Constriction of bronchi
Solution
Emphysema is a disease that affects alveoli of lungs get widen and in severe cases burst which reduces the amount of breathing required in normal person.
Its symptoms include:-
Shortening of breathing.
Lips and nails become blue or grey.
Mental alertness reduces.
Feeling of tiredness.
Its main cause is smoking but can happen by other means.
So the correct option is 'Widening of alveoli'.
Question 2
1 / -0

$CO_2$ transported as bicarbonate form is about:

A
0.9 mL

B
3.8 mL

C
0.27 mL

D
2.7 mL

Solution

Most carbon dioxide in the human blood transport system is carried in the form of bicarbonate. This is due to reason because blood flows through the tissues, carbon dioxide diffuses into red blood cells, where it is converted into bicarbonate. Additionally, a hydrogen ion is released from haemoglobin, thus allowing oxygen to bind to haemoglobin as blood flows through the lungs. This carbon dioxide is carried in form of bicarbonate in 0.9 mL concentration.
So the correct option is '0.9 mL'.
Question 3
1 / -0

Select the correct option regarding general characters of insects.

Respiratory Organs Circulatory system Excretory organs
(1) Book lungs Closed Nephridia
(2) Tracheae Open Malpighian tubules
(3) Book gills Closed Proboscis glands
(4) Gills Open Flame cells

A
1

B
3

C
2

D
4

Solution

The insect respiratory system uses a system of internal tubes and sacs through which gases either diffuse or are actively pumped, delivering oxygen directly to tissues that need it via their trachea. Because oxygen is delivered directly to tissues via tracheoles, the circulatory system is not used to carry oxygen and is therefore greatly reduced. The insect circulatory system is open; it has no veins or arteries, insects may have one to hundreds of Malpighian tubules. These tubules remove nitrogenous wastes from the hemolymph of the insect and regulate osmotic balance. Wastes and solutes are emptied directly into the alimentary canal, at the junction between the midgut and hindgut.
So, the correct answer is 'Tracheae- Open- Malphigian tubules '.
Question 4
1 / -0

Combination of haemoglobin with $O_2$ in lungs can be promoted by

A
Increasing $CO_2$ concentration in blood

B
Increasing $O_2$ concentration in blood

C
Decreasing $O_2$ concentration in blood

D
Introducing $CO$ in blood

Solution

As blood passes through the lungs, It picks up oxygen due to the increased oxygen pressure in capillaries. It releases oxygen in tissues of lower oxygen concentration. An increased oxygen concentration in the blood promotes the oxygen-hemoglobin combination in the lungs. This increased affinity is caused by a conformational change in hemoglobin molecules. Each hemoglobin can bind four oxygen molecules.
So the correct answer is 'Increasing $O_2$ concentration in blood'.
Question 5
1 / -0

Lungs made up of which structures

A
Branching network of Bronchi

B
Bronchioles

C
Alveoli

D
All of the above

Solution

Lungs are the main respiratory organs of the human respiratory system. The windpipe or trachea divides into two branches called bronchi, entering into each lung. Each bronchus in the lung further divides to form many bronchioles. These bronchioles end up in a sac-like structure called the alveoli. Hence, the lungs are made up of bronchi, bronchioles and alveoli.
Hence, the correct answer is 'All of the above'.
Question 6
1 / -0

If a person exhales out forcefully by applying all his efforts, what will be the pulmonary volume inhaled by him immediately under the normal condition without applying any extra effort?

A
TV + IRV

B
Only TV

C
TV+ERV

D
TV + IRV + ERV

Solution

Correct answer: D
Explanation:
• The maximum amount of air a person can breathe after forceful expiration is referred to as vital capacity.
• This includes Tidal Volume, Expiratory Reserve Volume, and Inspiratory Reserve Volume, which refers to the maximum amount of air a person can exhale after a strong inspiration.
Hence, the maximum amount a person can inhale after a forceful exhalation is TV+ERV+IRV.
Question 7
1 / -0

An example to cutaneous respiration

A
Frog

B
Cockroach

C
Man

D
Fish

Solution

Cutaneous respiration in frogs and other amphibians may be the primary respiratory mode during colder temperatures. Some amphibians utilizing cutaneous respiration have extensive folds of skin to increase the rate of respiration.
So, the correct answer is 'Frog'
Question 8
1 / -0

Carbon dioxide generated in the tissues is carried in venous blood primarily as

A
Dissolved gas in plasma

B
Carbamino haemoglobin

C
Sodium bicarbonate

D
Potassium bicarbonate

Solution

Carbon dioxide is carried in the venous blood from the tissue in different ways. It is either dissolved in the plasma and transported or it is transported as carbaminohemoglobin. However, carbon dioxide generated in the tissues is carried in venous blood primarily as sodium bicarbonate in venous blood.
Thus, the correct answer is 'Sodium bicarbonate.'
Question 9
1 / -0

Oxyhaemoglobin dissociates into oxygen and deoxyhaemoglobin at

A
low $O_2$ pressure in tissue

B
high $O_2$ pressure in tissue

C
equal $O_2$ pressure inside and outside tissue

D
all times irrespective of $O_2$ pressure
Solution
Factors that dissociate oxygen from haemoglobin include:-
The partial pressure of carbon dioxide is increased.
Increase in hydrogen ion level (pH).
Temperature is high
The partial pressure of oxygen is low which is near tissue.
So the correct option is 'low $O_2$ pressure in tissue'
Question 10
1 / -0

The lungs are protected by two membranes called ________

A
Pleural membrane

B
Meninges

C
Mucous membrane

D
None of the above

Solution

The lungs are protected by two membranes called the pleural membranes. The outer pleural membrane is called the pleura and the inner one is called the visceral or pulmonary layer. There is a space between the two layers called the intrapleural space. It is filled with fluid to keep the lungs protected from the shocks and injuries.
A. Pleural membranes are present around the lungs.
B. Meninges are present around the brain and spinal cord.
C. Mucous membranes are present around he visceral organs.
Hence, the correct answer is 'Pleural Membrane'.

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Re-Attempt Weekly Quiz Competition

	Respiratory Organs	Circulatory system	Excretory organs
(1)	Book lungs	Closed	Nephridia
(2)	Tracheae	Open	Malpighian tubules
(3)	Book gills	Closed	Proboscis glands
(4)	Gills	Open	Flame cells

Breathing and Exchange of Gases Test 50

Result

Breathing and Exchange of Gases Test 50

Score

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Rank

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SHARING IS CARING

Question 1

Widening of alveoli

Widening of bronchi

Constriction of alveoli

Constriction of bronchi

Solution

Question 2

0.9 mL

3.8 mL

0.27 mL

2.7 mL

Solution

Question 3

1

3

2

4

Solution

Question 4

Increasing CO2CO_2CO2​ concentration in blood

Increasing O2O_2O2​ concentration in blood

Decreasing O2O_2O2​ concentration in blood

Introducing COCOCO in blood

Solution

Question 5

Branching network of Bronchi

Bronchioles

Alveoli

All of the above

Solution

Question 6

TV + IRV

Only TV

TV+ERV

TV + IRV + ERV

Solution

Question 7

Frog

Cockroach

Man

Fish

Solution

Question 8

Dissolved gas in plasma

Carbamino haemoglobin

Sodium bicarbonate

Potassium bicarbonate

Solution

Question 9

low O2O_2O2​ pressure in tissue

high O2O_2O2​ pressure in tissue

equal O2O_2O2​ pressure inside and outside tissue

all times irrespective of O2O_2O2​ pressure

Solution

Question 10

Pleural membrane

Meninges

Mucous membrane

None of the above

Solution

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Increasing $CO_2$ concentration in blood

Increasing $O_2$ concentration in blood

Decreasing $O_2$ concentration in blood

Introducing $CO$ in blood

low $O_2$ pressure in tissue

high $O_2$ pressure in tissue

equal $O_2$ pressure inside and outside tissue

all times irrespective of $O_2$ pressure