Excess of carbon dixode in the body fluids

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NEET • BIOLOGY • BREATHING AND EXCHANGE OF GASES

Breathing and exchange of gases practice · Hard

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61 Hard

61 of 73

Understanding +4 | -1

Which of the following is correct?

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Correct option: A

The

H^{+}

released from carbonic acid combines with haemoglobin to form haemoglobinic acid

Option A (The

H^{+}

released from carbonic acid combines with haemoglobin to form haemoglobinic acid) is correct because the hydrogen ions released from carbonic acid bind to hemoglobin, contributing to the buffering capacity of blood.

62 Hard

62 of 73

Remembering +4 | -1

Select the correct statement from the following.

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Correct option: B

Type II alveolar cells are called septal cells

Option B (Type II alveolar cells are called septal cells) is correct because Type II alveolar cells are indeed also known as septal cells.

63 Hard

63 of 73

Understanding +4 | -1

Which of the following statements are not correct?
I. Diffusion membrane is made up of 3 layers
II. Solubility of

C{O_2}

in blood is higher than

{O_2}

by 25 times
III. Breathing volumes are estimated by spirometer
IV. High

{H^ + }

in blood favours oxygen dissociation
Choose the correct option

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Correct option: D

None of these

Option D (None of these) is correct because all the given statements are factually correct regarding respiration and gas exchange.

64 Hard

64 of 73

Remembering +4 | -1

Hiccup occurs due to

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Correct option: B

Contraction of the diaphragm

Option B (Contraction of the diaphragm) is correct because a hiccup is caused by involuntary spasms of the diaphragm.

65 Hard

65 of 73

Remembering +4 | -1

The volume of anatomically dead space, air in the lungs of human beings is normally

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Correct option: D

150 mL

Option D (150 mL) is correct because the volume of anatomically dead space air in the lungs is approximately 150 mL.

66 Hard

66 of 73

Application +4 | -1

At rest, most people require an alveolar ventilation for about

4 {~L} /

minute. Suppose an emphysema victim with a tidal volume of

0.5 {~L}

has suffered alveolar damage that has produced a respiratory dead space of

0.3 {~L}

, what will be that person's frequency of breathing at rest?

View answer and explanation

Correct option: C

20 breaths

/ {min}

Option C (20 breaths / min) is correct because it is calculated using the alveolar ventilation rate, tidal volume, and dead space volume.

67 Hard

67 of 73

Understanding +4 | -1

Which of the following changes will not affect respiration?

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Correct option: C

Arterial inulin concentration

Option C (Arterial inulin concentration) is correct because inulin is a marker of kidney function and does not directly affect respiration, unlike

H^+

and

HCO_3^-

68 Hard

68 of 73

Remembering +4 | -1

The basic rhythm of breathing is established by

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Correct option: B

inspiratory area

Option B (inspiratory area) is correct because the inspiratory area in the medulla oblongata establishes the basic rhythm of breathing.

69 Hard

69 of 73

Understanding +4 | -1

Rate of breathing is controlled by

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Correct option: D

None of the above

Option B (Carbon dioxide) is the correct answer because the rate of breathing is primarily controlled by the concentration of carbon dioxide in the blood.

70 Hard

70 of 73

Understanding +4 | -1

Which of the following conditions are found in the alveoli of lungs?
I. high

\mathrm{P}{\mathrm{O}_2}

II. Low

\mathrm{PC}{\mathrm{O}_2}

III. high

\mathrm{PC}{\mathrm{O}_2}

IV. low

\mathrm{P}{\mathrm{O}_2}

V. low

{H^ + }

VI. High

{H^ + }

Choose the correct option

View answer and explanation

Correct option: D

I, II and V

Option D (I, II and V) is correct because alveoli have high

\mathrm{P}{\mathrm{O}_2}

, low

\mathrm{PC}{\mathrm{O}_2}

, and low

{H^ + }

concentration due to gas exchange.

71 Hard

71 of 73

Remembering +4 | -1

Cyanosis is

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Correct option: D

'Skin turning blue' due to excessive amount of deoxygenated haemoglobin in the skin blood vessels

Option D ('Skin turning blue' due to excessive amount of deoxygenated haemoglobin in the skin blood vessels) is correct because cyanosis is the bluish discoloration of the skin and mucous membranes due to low oxygen levels in the blood.

72 Hard

72 of 73

Understanding +4 | -1

I. On an average a healthy human breathes 12-16 times/minute
II. The volume of air involved in the breathing movements can be estimated by spirometer
III. Diaphragm is very useful in both inspiration and expiration
Which of the above statements are incorrect?
Choose the correct option

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Correct option: D

None of these

Option D (None of these) is correct because all three statements are correct about human breathing.

73 Hard

73 of 73

Understanding +4 | -1

Oxygen

\left( {{O_2}} \right)

is utilised by an organism to

View answer and explanation

Correct option: B

Indirectly breakdown the nutrient molecules

Option B (Indirectly breakdown the nutrient molecules) is correct because oxygen is used in cellular respiration to indirectly break down nutrient molecules to release energy.

Revision notes and key takeaways

Review BREATHING AND EXCHANGE OF GASES in your textbook or class notes, then use this set to check your understanding.

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