NEET Solved Paper 2014 Question 59
Question: Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs [AIPMT 2014]
Options:
A) as bicarbonate ions
B) in the form of dissolved gas molecules
C) by binding to RBC
D) as carbamino-haemoglobin
Show Answer
Answer:
Correct Answer: A
Solution:
Because of its high solubility, about 7% of carbon dioxide gets dissolved in the blood plasma and is carried to the wings in the same way.
The largest fraction of carbon dioxide, i.e., (about 70%) is converted to bicarbonates ( $ HCO_3^{-} $ ) and transported in the plasma.
$ CO _2+H _2OH _2CO _3 $ $ HCO_3^{-}+{H^{+}} $ About (- 23% of $ CO _2 $ is carried by haemoglobin as carbominohaemoglobin $ CO _2+Hb(haemoglaobin)\rightarrow \underset{carboamino,haemoglobin}{\mathop{HbCO _3}}, $
