Question

Carbon dioxide is transported via blood to lungs mostly

• A. As carbaminohaemoglobin and as carbonic acid.
• B. In the form of carbonic acid only.
• C. In combination with haemoglobin only.
• D. Dissolved in blood plasma.

Answer 1

The correct option is A As carbaminohaemoglobin and as carbonic acid.

Transport of carbon dioxide in a chemically modified form accounts for nearly 70% of total carbon dioxide transport and is achieved by carbon dioxide conversion to bicarbonate. Transport of carbon dioxide in a protein bound form accounts for nearly 20% of total carbon dioxide transport and is achieved by reversible binding of carbon dioxide to haemoglobin (carbaminohaemoglobin).

So, the correct answer is 'As carbaminohaemoglobin and as carbonic acid.'