Regarding the transport of respiratory gases by human blood:
Statement I: Every 100 ml of oxygenated blood can deliver around 5 ml of O2 to the tissues under normal physiological conditions.
Statement II: Every 100 ml of deoxygenated blood delivers approximately 4 ml of CO2 to the alveoli.
1. Statement I is correct; Statement II is correct
2. Statement I is incorrect; Statement II is correct
3. Statement I is correct; Statement II is incorrect
4. Statement I is incorrect; Statement II is incorrect
Subtopic:  Respiratory System: Transport of Gases |
 90%
Level 1: 80%+
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The amount of carbon dioxide delivered by 100 ml of deoxygenated blood at alveoli under normal physiological conditions:
1. is equal to the amount of oxygen delivered by 100 ml of oxygenated blood at tissues under normal physiological conditions.
2. is less than the amount of oxygen delivered by 100 ml of oxygenated blood at tissues under normal physiological conditions.
3. is twice the amount of oxygen delivered by 100 ml of oxygenated blood at tissues under normal physiological conditions.
4. is more than 10 times higher than the amount of oxygen delivered by 100 ml of oxygenated blood at tissues under normal physiological conditions.
Subtopic:  Respiratory System: Transport of Gases |
 87%
Level 1: 80%+
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Consider the two statements:
Statement I: Even after exhaling as forcefully as possible, one still has air in the lungs.
Statement II: The value for vital capacity is higher that the value for functional residual capacity in a healthy adult.

1. Statement I is correct: Statement II is incorrect
2. Statement I is incorrect: Statement II is correct
3. Statement I is correct: Statement II is correct
4. Statement I is incorrect: Statement II is incorrect
Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases Part 2 | Respiratory System: Transport of Gases |
 80%
Level 1: 80%+
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Under normal physiological conditions every 100 ml of deoxygenated blood delivers:
1. approximately 4 ml of CO2 to the alveoli.
2. approximately 5 ml of CO2 to the alveoli.
3. approximately 4 ml of CO2 to the tissues.
4. approximately 5 ml of CO2 to the tissues.
Subtopic:  Respiratory System: Transport of Gases |
 78%
Level 2: 60%+
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Assertion(A): At the alveoli, oxygen diffuses into the blood and carbon dioxide diffuses out from the blood.
Reason(R): The partial pressure of carbon dioxide and oxygen is higher in alveoli than in the blood.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False and (R) is True.
Subtopic:  Respiratory System: Transport of Gases |
 78%
Level 2: 60%+
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Which of the following sets of conditions is most favourable for the formation of oxyhaemoglobin in the human body?
1. High pO₂, low pCO₂, high H⁺ concentration, and high temperature
2. Low pO₂, high pCO₂, low H⁺ concentration, and low temperature
3. High pO₂, low pCO₂, low H⁺ concentration, and low temperature
4. Low pO₂, low pCO₂, high H⁺ concentration, and high temperature
Subtopic:  Respiratory System: Transport of Gases |
 86%
Level 1: 80%+
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Consider the following statements about oxygen transport in the blood:
A. Each haemoglobin molecule can carry a maximum of four molecules of O₂.
B. The oxygen dissociation curve is linear and steep under all physiological conditions.
C. Factors like high pCO₂, high temperature, and increased H⁺ concentration favour the release of O₂ at the tissues.
D. On average, 100 ml of oxygenated blood delivers about 5 ml of O₂ to the tissues.
How many of the above statements are correct?
1. Only two
2. Only three
3. All four
4. Only one
Subtopic:  Respiratory System: Transport of Gases |
 74%
Level 2: 60%+
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