Breathing and Exchange of Gases Test 6

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Breathing and Exchange of Gases Test 6

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Weekly Quiz Competition

Question 1
1 / -0

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

A
Humidifies the air

B
Warms up the air

C
Cleans up the air

D
Diffusion of gases

Solution

The function of respiratory system does not deal with the cleaning up of the air.
Question 2
1 / -0

The principle of exchange of gases at the lungs is :

A
Filtration

B
Conditioning and facilitated transport

C
both diffusion and filtration

D
Diffusion

Solution

Exchange of gases at the lungs by simple diffusion.
Question 3
1 / -0

The regulatory centres for respiration are located in :

A
Diencephalon and pons

B
medulla oblongata & pons

C
pons & cerebellum

D
cerebellum and medulla oblongata

Solution

A specialisedcentre present in the medulla region of the brain called respiratory rhythm centre is primarily responsible for this regulation. In the pons region of the brain called pneumotaxiccentre can moderate the functions of the respiratory rhythm centre.
Question 4
1 / -0

In CNS, regulation of respiratory rhythm during normal breathing is largely dependent upon :

A
carbon dioxide concentration

B
oxyhemoglobin concentration

C
RBCs in the body

D
oxygen concentration

Solution

In central nervous system, regulation of respiratory rhythm during normal breathing is dependent upon concentration of carbon dioxide gas in air.
Question 5
1 / -0

Match the following:

A
a)-iii, b)-iv, c)-ii, d)-i

B
a)-iv, b)-i, c)-ii, d)-iii

C
a)-ii, b)-iii, c)-i, d)-iv

D
a)-ii, b)-i, c)-iv, d)-iii

Solution

TV isapprox. 500 mL., i.e., a healthy man caninspire or expire approximately 6000 to 8000mL of air per minute. IRV averages 2500mL to 3000 mL.ERV averages 1000mL to 1100 mL. RV averages 1100 mL to 1200 mL.
Question 6
1 / -0

Respiration in insects is direct due to exchange of gases

A
Directly with the air outside through body surface

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

C
Directly with coelomic fluid

D
Directly with the air in tubes

Solution

In insects, the respiration takes place through tracheal tubes which directly exchange gases with haemocoel and then with tissues.
Question 7
1 / -0

Read the following statements :
i. The affinity of Hb for CO is 200 to 250 times more than its affinity for oxygen therefore CO competes with oxygen for binding to Hb.
ii. The result of this binding are a shift of oxygen-hemoglobin dissociation curve to the left and its alteration to a more hyperbolic shape.

A
both are correct

B
Statement i) is correct and ii) is wrong

C
Statement i) is wrong and ii) is correct

D
both are wrong

Solution

Correct Answer :- a
Explanation : a) Carboxyhemoglobin (COHb) is formed when CO binds with hemoglobin with an affinity 200 times greater than oxygen, thereby decreasing oxygen-carrying capacity and the release of oxygen to tissues, leading to tissue hypoxia.
b) The reason why the curves are different is because of the
different structures of myoglobin and haemoglobin. Myoglobin contains only a single globin chain: its dissociation curve is a rectangular hyperbola. Haemoglobin contains four globin chains and the oxygenation of each chain causes structural changes which increase the affinity of the haem of the remaining chains for oxygen. This consequence of subunit interaction is known as positive cooperativity and this increasing oxygen affinity as oxygen loads is the cause of the sigmoid shape of the dissociation curve.
Question 8
1 / -0

RBCs and muscle cells carry out anaerobic respiration, but :
i. RBCs are permanently anaerobic and muscle cells are temporarily anaerobic
ii. RBCs are temporarily anaerobic and muscle cells are permanently anaerobic
iii. Muscle cells lack mitochondria.

A
only statement ii) is correct.

B
only statement ii) and iii) are correct.

C
only statement i) is correct.

D
None of the statements are correct.

Solution

Red blood cells and muscle cells carry out anaerobic respiration but RBC’s are permanently anaerobic and muscle cells are temporarily anaerobic in nature.
Question 9
1 / -0

Loud snoring and labored breathing are symptoms of :

A
peripheral sleep apnea

B
obstructive sleep apnea

C
central sleep apnea

D
bronchitis

Solution

Loud snoring and labored breathing are the symptoms of obstructive sleep apnea. Obstructive sleep apnea is a sleep disorder in which breathing is briefly and repeatedly interrupted.
Question 10
1 / -0

A film of _____ lines lung alveoli that lowers _____ of the alveoli and makes breathing _____ :

A
Lecithin, surface tension, easier.

B
Pleuron, surface tension, easier.

C
Cuticle, bacterial inflammation, difficult.

D
Cuticle, inflating, difficult.

Solution

A thin film of lecithin lines lung alveoli that lowers surface tension of the alveoli and makes breathing easier. The lining also reduces the friction of alveoli to avoid its damage.
Question 11
1 / -0

Water breathing is more problematic than air breathing because :
i. water is 800 times more dense and hence holds much more oxygen than air does.
ii. since oxygen dissolved in water diffuses far more slowly than air therefore large quantity of water is required to be passed over the gills.

A
statement ii) is wrong and i) is correct.

B
both statements are wrong.

C
statementi) is wrong and ii) is correct.

D
both statements are correct.

Solution

Water breathing is more problematic than air breathing because oxygen dissolved in water diffuses far more slowly than air therefore large quantity of water is required to be passed over the gills.
Question 12
1 / -0

Read the following about blood pigments :
i. Hemoglobin is the pigment present in our blood and is iron containing protein.
ii. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein.
iii. Haemocyanin is much more efficient than haemoglobin.

A
only statement i) is correct.

B
all statements are correct.

C
pnly statement ii) and iii) are correct.

D
only statement i) and ii) are correct.

Solution

Haemoglobin is the pigment present in our blood and is iron containing protein. Haemocyanin is the pigment present in blood of Palaemon and is copper containing protein.
Question 13
1 / -0

The given graph shows O₂ consumption and ventilation during exercise so we can infer from this graph :

i. During exercise, oxygen consumption rate in our body increases.
ii. Neural stimulus allows abdominal muscles , which are a kind of smooth muscle to contract to facilitate ventilation while exercising.
iii. Increase in ventilation during exercise prevents large changes in the partial pressure of O₂ or CO₂
iv. The overall impact is breathing rate increases.

A
all the above statements are correct.

B
onlyi) and iii) are correct.

C
onlyi) and ii) are correct.

D
only i),iii) and iv) are correct.

Solution

During exercise Oxygen consumption and ventilation changes drastically. Oxygen consumption rate in our body increases during exercise. Increase in ventilation during exercise prevents large change in the partial pressure of O₂ and CO₂ to increase breathing rate.
Question 14
1 / -0

The exchange of gases in :
i. the alveoli that lowers the pO₂ of blood and raises its pCO₂ is external respiration
ii. the tissues that lowers the pCO₂ of blood and raises its pO₂ is internal respiration

A
statement ii) is wrong and i) is correct.

B
both statements are correct.

C
statementi) is wrong and ii) is correct.

D
both statements are wrong.

Solution

In the alveoli, there is high pO₂ , low pCO₂ , lesser H+ concentration and lower temperature,
Question 15
1 / -0

Habit of Cigarette smoking can lead to :

A
loss of cilia lining the respiratory tract

B
all of the following

C
coughing

D
emphysema

Solution

The habit of Cigarette smoking can lead to coughing, emphysema and loss of cilia lining the respiratory tract. It contain nicotine that breaks the wall of alveoli to reduce respiratory surface.
Question 16
1 / -0

Read the following :
i. During chloride shift , the chloride ions diffuse from RBC’s into the blood plasma.
ii. Chloride shift, helps to maintain ionic balance and chemical neutrality.
iii. Chloride shift occurs during transport of CO₂ .

A
only statement ii) and iii) are correct.

B
only statement i) and ii) are correct.

C
only statement iii) is correct.

D
all statements are correct.

Solution

Correct Answer :- d
Explanation : a) The chloride shift is an exchange of ions that takes place in our red blood cells in order to ensure that no build up of electric change takes place during gas exchange. Within our tissues, the cells produce a bunch of carbon dioxide molecules that are ultimately expelled by the cell and travel to the blood plasma.
b) To maintain this ionic balance, the chloride iona diffuse from blood plasma to RBC.This phenomenon of chloride ion diffusing into the erythrocytes to maintain the ionic balance is called chloride shift.
c) Carbon dioxide is produced in tissues as a byproduct of normal metabolism. It dissolves in the solution of blood plasma and into RBC, where carbonic anhydrase catalyzes its hydration to carbonic acid (H2CO3). Carbonic acid then spontaneously dissociates to form bicarbonate Ions (HCO3−) and a hydrogen ion (H+) in response to the decrease in intracellular partial pressure of CO2, more CO2 passively diffuses into the cell.
Question 17
1 / -0

Insect of family chironomidae eg..chironomous larvae are also known as bloodworms since :

A
they contain haemoglobin as their respiratory pigment

B
both A & B

C
they are blood parasites

D
they contain haemocyanin as their respiratory pigment

Solution

Insects of family Chironomidae eg. Chironomous larvae as also known as blood worms because they contain haemoglobin as their respiratory pigment.
Question 18
1 / -0

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

A
2550ml

B
1100ml

C
1200ml

D
1150ml

Solution

RV = TLC - IRV – ERV– TV. On substituting the values, we get 1150ml.
Question 19
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), ii), iii), iv), v)

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

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

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

Solution

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 20
1 / -0

Match the following:

A
a)-iv, b)-ii, c)-v, d)-i, e)-iii

B
a)-ii, b)-i, c)-iv, d)-iii, e)-v

C
a)-i, b)-iii, c)-v, d)-ii, e)-iv

D
a)-v, b)-iv, c)-iii, d)-i, e)-ii

Solution

Respiratory organ of Nereis is parapodia, Limulus is book gills, Palamnaeus is book lungs and respiratory organ of Dugesia is general body surface. Palaemon respire through gills.

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Breathing and Exchange of Gases Test 6

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SHARING IS CARING

Question 1

Humidifies the air

Warms up the air

Cleans up the air

Diffusion of gases

Solution

Question 2

Filtration

Conditioning and facilitated transport

both diffusion and filtration

Diffusion

Solution

Question 3

Diencephalon and pons

medulla oblongata & pons

pons & cerebellum

cerebellum and medulla oblongata

Solution

Question 4

carbon dioxide concentration

oxyhemoglobin concentration

RBCs in the body

oxygen concentration

Solution

Question 5

a)-iii, b)-iv, c)-ii, d)-i

a)-iv, b)-i, c)-ii, d)-iii

a)-ii, b)-iii, c)-i, d)-iv

a)-ii, b)-i, c)-iv, d)-iii

Solution

Question 6

Directly with the air outside through body surface

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

Directly with coelomic fluid

Directly with the air in tubes

Solution

Question 7

both are correct

Statement i) is correct and ii) is wrong

Statement i) is wrong and ii) is correct

both are wrong

Solution

Question 8

only statement ii) is correct.

only statement ii) and iii) are correct.

only statement i) is correct.

None of the statements are correct.

Solution

Question 9

peripheral sleep apnea

obstructive sleep apnea

central sleep apnea

bronchitis

Solution

Question 10

Lecithin, surface tension, easier.

Pleuron, surface tension, easier.

Cuticle, bacterial inflammation, difficult.

Cuticle, inflating, difficult.

Solution

Question 11

statement ii) is wrong and i) is correct.

both statements are wrong.

statementi) is wrong and ii) is correct.

both statements are correct.

Solution

Question 12

only statement i) is correct.

all statements are correct.

pnly statement ii) and iii) are correct.

only statement i) and ii) are correct.

Solution