Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion (A): During the transporation of gases, about 20-25 percent of CO2 is carried by haemoglobin as carbamino-haemoglobin.
Reason (R): This binding is related to high pCO2 and low pO2 in the tissues

In the light of the above statements, choose the correct answer from the options given below.
1.  (A) is True but (R) is False.
2.  (A) is False but (R) is True.
3.  Both (A)and (R) are True and (R) is the correct explanation of (A).
4.  Both (A) and (R) are True but (R) is not the correct explanation of (A).
Subtopic:  Respiratory System: Transport of Gases |
 57%
From NCERT
NEET - 2024
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Under normal physiological conditions in human being every 100 ml of oxygenated blood can deliver  _____________ml of O2 to the tissues.
1. 10 ml
2. 2 ml 
3. 5 ml
4. 4 ml

Subtopic:  Respiratory System: Transport of Gases |
 85%
From NCERT
NEET - 2022
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch

Select the favorable conditions required for the formation of oxyhemoglobin at the alveoli. 

1. High pO2, high pCO2, less H+, higher temperature

2. Low pO2, low pCO2, more H+, higher temperature

3. High pO2, low pCO2, less H+, lower temperature

4. Low pO2 high pCO2 more H+, higher temperature

Subtopic:  Respiratory System: Transport of Gases |
 89%
From NCERT
NEET - 2021
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch

Identify the wrong statement with reference to transport of oxygen:

1. Partial pressure of CO2 can interfere with O2 binding with haemoglobin.
2. Higher H+ concentration in alveoli favours the formation of oxyhaemoglobin.
3. Low pCO2 in alveoli favours the formation of oxyhaemoglobin.
4.  Binding of oxygen with haemoglobin is mainly related to partial pressure of O2.

Subtopic:  Respiratory System: Transport of Gases Part 1 | Respiratory System: Transport of Gases |
 81%
From NCERT
NEET - 2020
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NEET 2025 - Target Batch
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NEET 2025 - Target Batch