Same chapter3 marksDifficulty: Medium
Name three respiratory disorders and state the cause of each.
Breathing and Exchange of Gases
3 marksDifficulty: Medium
Describe how oxygen and carbon dioxide are transported in the blood.
Original Khojo Papers practice question — not from a past board paper.
Answer
About 97% of the oxygen is carried as oxyhaemoglobin in the red cells and the rest dissolved in plasma. Carbon dioxide is carried chiefly as bicarbonate ions in the plasma, about 70%, with about 20 to 25% as carbaminohaemoglobin and the remainder dissolved.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
The enzyme carbonic anhydrase in the red cells makes the bicarbonate route possible.
Related questions
From the same topic and chapter, at a similar level.
Same chapter3 marksDifficulty: Medium
What is the oxygen dissociation curve, and what shifts it to the right?
Breathing and Exchange of Gases
Same chapter3 marksDifficulty: Medium
Define tidal volume, vital capacity and residual volume.
Breathing and Exchange of Gases
Same subject3 marksDifficulty: Medium
State three differences between gymnosperms and angiosperms.
Plant Kingdom
Same subject3 marksDifficulty: Medium
State three characteristics of bryophytes and name one example.
Plant Kingdom
Same subject3 marksDifficulty: Medium
What are viruses, and why are they placed outside the five-kingdom system?
The Living World and Biological Classification