Search any question & find its solution
Question:
Answered & Verified by Expert
Carbon dioxide is transported from tissues to respiratory surface by only:
Options:
Solution:
1121 Upvotes
Verified Answer
The correct answer is:
Plasma and erthrocytes
CO2 from the respiratory tissues to the lungs is transported by the blood in 3 ways:
(i) In dissolved state or as a physical solution: Very small amount physically dissolved in plasma (7% i.e. ≅ 0.3 ml of CO2 by every 100 ml of blood)
(ii) Bicarbonate ions: ≅ 70% (i.e., ≅ 2.5 ml per 100 ml of blood) CO2 diffuses in plasma & then into RBCs were it (in the presence of carbonic anhydrase) combines with H2O to form carbonic acid which is almost spontaneously dissociated into hydrogen ion & bicarbonate ions.
(iii) Carbaminohaemoglobin: ≅23 % (i.e., ≅ 1 ml of CO2 per 100 ml of blood) combines with haemoglobin forming an unstable compound.
(i) In dissolved state or as a physical solution: Very small amount physically dissolved in plasma (7% i.e. ≅ 0.3 ml of CO2 by every 100 ml of blood)
(ii) Bicarbonate ions: ≅ 70% (i.e., ≅ 2.5 ml per 100 ml of blood) CO2 diffuses in plasma & then into RBCs were it (in the presence of carbonic anhydrase) combines with H2O to form carbonic acid which is almost spontaneously dissociated into hydrogen ion & bicarbonate ions.
(iii) Carbaminohaemoglobin: ≅23 % (i.e., ≅ 1 ml of CO2 per 100 ml of blood) combines with haemoglobin forming an unstable compound.
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.