A large proportion of oxygen is left unused in the human blood even after its uptake by…

Biology · NEET · NTA ExamsBreathing and Exchange of Gases

A large proportion of oxygen is left unused in the human blood even after its uptake by the body tissues. This O2:
  1. acts as a reserve during muscular exercise
  2. raise the pCO2 of blood to 75 mm of Hg
  3. is enough to keep oxyhaemoglobin saturation at 96%
  4. helps in releasing more O2 to the epithelial tissues

Answer

(A) acts as a reserve during muscular exercise

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