NEET 2014 · Class 11

Breathing and Exchange of Gases

Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs (2014)

  1. (A)as bicarbonate ions
  2. (B)in the form of dissolved gas molecules
  3. (C)by binding to R.B.C
  4. (D)as carbamino - haemoglobin

The NCERT line that answers it

Verbatim line

Nearly 20-25 per cent of $CO_2$ is transported by RBCs whereas 70 per cent of it is carried as bicarbonate.

Chapter
Breathing and Exchange of Gases
Section
14.4 TRANSPORT OF GASES

The answer appears as a continuous sentence in NCERT. This is that sentence.

How this line gives the answer

5, emb=1.0, combined=0.8). Verified: high — The span explicitly states '70 per cent of it is carried as bicarbonate', which directly matches the correct answer and distinguishes it from other options.

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