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NEET • BIOLOGY • BREATHING AND EXCHANGE OF GASES

Breathing and exchange of gases practice · Easy

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91 Easy

91 of 104

Understanding +4 | -1

Which of the following statement is false?

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Correct option: D

None of the above

Option D (None of the above) is correct because all the statements are true; the conducting part transports and conditions air, and the exchange part is where gas exchange occurs.

92 Easy

92 of 104

Understanding +4 | -1

\mathrm{C}{\mathrm{O}_2}

dissociates in alveoli from carbohaemoglobin when

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Correct option: D

\rho {O_2} = high\,,\,\rho C{O_2} = low

Option D (

\rho {O_2} = high,\,\rho C{O_2} = low

) is correct because carbon dioxide dissociates from carbohaemoglobin in the alveoli when the partial pressure of oxygen is high and the partial pressure of carbon dioxide is low.

93 Easy

93 of 104

Understanding +4 | -1

Identify which respiratory structure possesses the following features and choose the correct option accordingly
I. Found in mammals
II. Highly muscular and fibrous partition, elevated towards the thorax like a dome
III. Separates thoracic and abdominal cavity

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Correct option: C

Diaphragm

Option C (Diaphragm) is correct because the diaphragm is a muscular partition found in mammals that separates the thoracic and abdominal cavities.

94 Easy

94 of 104

Remembering +4 | -1

Carbonic anhydrase is found in

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Correct option: C

Both (a) and (b)

Option C (Both (a) and (b)) is correct because carbonic anhydrase is found in both blood (specifically RBCs) and plasma.

95 Easy

95 of 104

Remembering +4 | -1

Vocal cords occur in

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Correct option: B

Larynx

Option B (Larynx) is correct because the vocal cords are located within the larynx.

96 Easy

96 of 104

Understanding +4 | -1

Which have no specific organ for respiration but respire ?

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Correct option: B

Earthworm

Option B (Earthworm) is correct because earthworms respire through their moist skin (cutaneous respiration) and do not have specialized respiratory organs like lungs or gills.

97 Easy

97 of 104

Remembering +4 | -1

Exchange of gases in lungs occurs through

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Correct option: A

Simple diffusion

Option A (Simple diffusion) is correct because gas exchange in the lungs occurs down a concentration gradient via simple diffusion.

98 Easy

98 of 104

Analyzing +4 | -1

Complete the analogy
Industrial pollutants : Occupational respiratory disorders :: Cigarette smoking: ______

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Correct option: B

Emphysema

Option B (Emphysema) is correct because cigarette smoking is a major cause of emphysema, just as industrial pollutants are a cause of occupational respiratory disorders.

99 Easy

99 of 104

Understanding +4 | -1

Mr. Josh exhales normally, then using forced expiration, he exhales as much air as possible. The volume of air still remaining in his lungs is called

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Correct option: D

Residual volume

Option D (Residual volume) is correct because residual volume is the air remaining in the lungs after a forced expiration.

100 Easy

100 of 104

Understanding +4 | -1

The factors are all favourable for the formation of oxyhaemoglobin except one that is

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Correct option: B

low

P{O_2}

The correct answer is B (low

P{O_2}

) because high

P{O_2}

, low pH, and lower temperature all favor the formation of oxyhemoglobin, while low

P{O_2}

favors the dissociation of oxygen from hemoglobin.

101 Easy

101 of 104

Understanding +4 | -1

Tobacco smoke contains carbon monoxide, which

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Correct option: A

Reduces the oxygen-carrying capacity of blood

Option A (Reduces the oxygen-carrying capacity of blood) is correct because carbon monoxide binds to hemoglobin more readily than oxygen, reducing oxygen transport.

102 Easy

102 of 104

Remembering +4 | -1

Which of the following respiratory organs are present in spiders and scorpions?

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Correct option: A

Book lungs

Option A (Book lungs) is correct because spiders and scorpions, belonging to the class Arachnida, use book lungs for respiration.

103 Easy

103 of 104

Remembering +4 | -1

Breathing involves …A… during which atmospheric air is drawn in and …B… by which the alveolar air is released out.
Choose the correct option for A and B to complete the given NCERT statement

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Correct option: C

A-inspiration; B-expiration

Option C (A-inspiration; B-expiration) is correct because breathing involves inspiration (drawing air in) and expiration (releasing air out).

104 Easy

104 of 104

Understanding +4 | -1

Under which condition, dissociation of oxygen from oxyhaemoglobin in tissues occurs?

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Correct option: D

All of these

The correct answer is D (All of these) because low oxygen partial pressure, high carbon dioxide partial pressure, and high hydrogen ion concentration (low pH) all promote the dissociation of oxygen from oxyhemoglobin in tissues.

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.

Showing 91-104 of 104 questions

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