QBManager

BREATHING and EXCHANGE OF GASES(NCERT)

286123 Which of the following statements is not true?

1 The partial pressure of oxygen in deoxygenated blood is

40 mmHg

2 The partial pressure of oxygen in oxygenated blood is

95 mmHg

3 The partial pressure of oxygen in the alveolar air is

104 mmHg

4 The partial pressure of carbon dioxide in deoxygenated blood is

95 mmHg

NCERT ( Page-272 / N-187

BREATHING and EXCHANGE OF GASES(NCERT)

286124 Which of the following equation shows the role of carbonic anhydrase enzyme in the transport of carbon dioxide by blood?

1

C O_{2} + H_{2} O ⇄ H_{2} C O_{3} ⇄ {HCO}_{3}^{-} + H^{+}

2

C_{6} H_{12} O_{6} + 6 O_{2} 6 C O_{2} + 6 H_{2} O

3

C_{6} H_{12} O_{6} \to 2 C_{6} H_{5} OH + 2 C O_{2}

4 None of the above.

Explanation:

(a) Oxygen dissociation curve describes the relation between the partial pressure of oxygen ( $x$ -axis) and the haemoglobin saturation ( $y$ -axis). Haemoglobin's affinity for oxygen increases as successive molecules of oxygen bind.

NCERT ( Page-275. / N-190

BREATHING and EXCHANGE OF GASES(NCERT)

286125 $O_{2}$ dissociation curve is plotted between $p O_{2}$ and

1

saturation

2

pC O_{2}

3

Hb

concentration

4

RBC / m m^{3}

of blood

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286126 Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

1 as bicarbonate ions

2 in the form of dissolved gas molecules

3 by binding to RBC

4 as carbamino-haemoglobin

Explanation:

(a) $C O_{2}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways:

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286127 Oxygen dissociation curve of haemoglobin is

1 Sigmoid

2 Hyperbolic

3 Linear

4 Hypobolic

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286123 Which of the following statements is not true?

1 The partial pressure of oxygen in deoxygenated blood is

40 mmHg

2 The partial pressure of oxygen in oxygenated blood is

95 mmHg

3 The partial pressure of oxygen in the alveolar air is

104 mmHg

4 The partial pressure of carbon dioxide in deoxygenated blood is

95 mmHg

NCERT ( Page-272 / N-187

BREATHING and EXCHANGE OF GASES(NCERT)

286124 Which of the following equation shows the role of carbonic anhydrase enzyme in the transport of carbon dioxide by blood?

1

C O_{2} + H_{2} O ⇄ H_{2} C O_{3} ⇄ {HCO}_{3}^{-} + H^{+}

2

C_{6} H_{12} O_{6} + 6 O_{2} 6 C O_{2} + 6 H_{2} O

3

C_{6} H_{12} O_{6} \to 2 C_{6} H_{5} OH + 2 C O_{2}

4 None of the above.

Explanation:

(a) Oxygen dissociation curve describes the relation between the partial pressure of oxygen ( $x$ -axis) and the haemoglobin saturation ( $y$ -axis). Haemoglobin's affinity for oxygen increases as successive molecules of oxygen bind.

NCERT ( Page-275. / N-190

BREATHING and EXCHANGE OF GASES(NCERT)

286125 $O_{2}$ dissociation curve is plotted between $p O_{2}$ and

1

saturation

2

pC O_{2}

3

Hb

concentration

4

RBC / m m^{3}

of blood

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286126 Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

1 as bicarbonate ions

2 in the form of dissolved gas molecules

3 by binding to RBC

4 as carbamino-haemoglobin

Explanation:

(a) $C O_{2}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways:

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286127 Oxygen dissociation curve of haemoglobin is

1 Sigmoid

2 Hyperbolic

3 Linear

4 Hypobolic

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286123 Which of the following statements is not true?

1 The partial pressure of oxygen in deoxygenated blood is

40 mmHg

2 The partial pressure of oxygen in oxygenated blood is

95 mmHg

3 The partial pressure of oxygen in the alveolar air is

104 mmHg

4 The partial pressure of carbon dioxide in deoxygenated blood is

95 mmHg

NCERT ( Page-272 / N-187

BREATHING and EXCHANGE OF GASES(NCERT)

286124 Which of the following equation shows the role of carbonic anhydrase enzyme in the transport of carbon dioxide by blood?

1

C O_{2} + H_{2} O ⇄ H_{2} C O_{3} ⇄ {HCO}_{3}^{-} + H^{+}

2

C_{6} H_{12} O_{6} + 6 O_{2} 6 C O_{2} + 6 H_{2} O

3

C_{6} H_{12} O_{6} \to 2 C_{6} H_{5} OH + 2 C O_{2}

4 None of the above.

Explanation:

(a) Oxygen dissociation curve describes the relation between the partial pressure of oxygen ( $x$ -axis) and the haemoglobin saturation ( $y$ -axis). Haemoglobin's affinity for oxygen increases as successive molecules of oxygen bind.

NCERT ( Page-275. / N-190

BREATHING and EXCHANGE OF GASES(NCERT)

286125 $O_{2}$ dissociation curve is plotted between $p O_{2}$ and

1

saturation

2

pC O_{2}

3

Hb

concentration

4

RBC / m m^{3}

of blood

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286126 Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

1 as bicarbonate ions

2 in the form of dissolved gas molecules

3 by binding to RBC

4 as carbamino-haemoglobin

Explanation:

(a) $C O_{2}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways:

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286127 Oxygen dissociation curve of haemoglobin is

1 Sigmoid

2 Hyperbolic

3 Linear

4 Hypobolic

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286123 Which of the following statements is not true?

1 The partial pressure of oxygen in deoxygenated blood is

40 mmHg

2 The partial pressure of oxygen in oxygenated blood is

95 mmHg

3 The partial pressure of oxygen in the alveolar air is

104 mmHg

4 The partial pressure of carbon dioxide in deoxygenated blood is

95 mmHg

NCERT ( Page-272 / N-187

BREATHING and EXCHANGE OF GASES(NCERT)

286124 Which of the following equation shows the role of carbonic anhydrase enzyme in the transport of carbon dioxide by blood?

1

C O_{2} + H_{2} O ⇄ H_{2} C O_{3} ⇄ {HCO}_{3}^{-} + H^{+}

2

C_{6} H_{12} O_{6} + 6 O_{2} 6 C O_{2} + 6 H_{2} O

3

C_{6} H_{12} O_{6} \to 2 C_{6} H_{5} OH + 2 C O_{2}

4 None of the above.

Explanation:

(a) Oxygen dissociation curve describes the relation between the partial pressure of oxygen ( $x$ -axis) and the haemoglobin saturation ( $y$ -axis). Haemoglobin's affinity for oxygen increases as successive molecules of oxygen bind.

NCERT ( Page-275. / N-190

BREATHING and EXCHANGE OF GASES(NCERT)

286125 $O_{2}$ dissociation curve is plotted between $p O_{2}$ and

1

saturation

2

pC O_{2}

3

Hb

concentration

4

RBC / m m^{3}

of blood

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286126 Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

1 as bicarbonate ions

2 in the form of dissolved gas molecules

3 by binding to RBC

4 as carbamino-haemoglobin

Explanation:

(a) $C O_{2}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways:

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286127 Oxygen dissociation curve of haemoglobin is

1 Sigmoid

2 Hyperbolic

3 Linear

4 Hypobolic

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286123 Which of the following statements is not true?

1 The partial pressure of oxygen in deoxygenated blood is

40 mmHg

2 The partial pressure of oxygen in oxygenated blood is

95 mmHg

3 The partial pressure of oxygen in the alveolar air is

104 mmHg

4 The partial pressure of carbon dioxide in deoxygenated blood is

95 mmHg

NCERT ( Page-272 / N-187

BREATHING and EXCHANGE OF GASES(NCERT)

286124 Which of the following equation shows the role of carbonic anhydrase enzyme in the transport of carbon dioxide by blood?

1

C O_{2} + H_{2} O ⇄ H_{2} C O_{3} ⇄ {HCO}_{3}^{-} + H^{+}

2

C_{6} H_{12} O_{6} + 6 O_{2} 6 C O_{2} + 6 H_{2} O

3

C_{6} H_{12} O_{6} \to 2 C_{6} H_{5} OH + 2 C O_{2}

4 None of the above.

Explanation:

(a) Oxygen dissociation curve describes the relation between the partial pressure of oxygen ( $x$ -axis) and the haemoglobin saturation ( $y$ -axis). Haemoglobin's affinity for oxygen increases as successive molecules of oxygen bind.

NCERT ( Page-275. / N-190

BREATHING and EXCHANGE OF GASES(NCERT)

286125 $O_{2}$ dissociation curve is plotted between $p O_{2}$ and

1

saturation

2

pC O_{2}

3

Hb

concentration

4

RBC / m m^{3}

of blood

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286126 Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs

1 as bicarbonate ions

2 in the form of dissolved gas molecules

3 by binding to RBC

4 as carbamino-haemoglobin

Explanation:

(a) $C O_{2}$ from the respiratory tissues to the lungs is transported by the blood in 3 ways:

NCERT Page-274 / N-189

BREATHING and EXCHANGE OF GASES(NCERT)

286127 Oxygen dissociation curve of haemoglobin is

1 Sigmoid

2 Hyperbolic

3 Linear

4 Hypobolic

NCERT Page-274 / N-189