1
Question
Most of CO2 is removed from the body in the form of?
Most of CO2 is removed from the body in the form of?
Open in App
Solution
The correct option is A HCO−3
B. HCO3-Reason: A large amount of carbon dioxide molecules are carried in the form of a bicarbonate ion which is part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. Carbonic anhydrase (CA) within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3), an unstable intermediate molecule that immediately dissociates into bicarbonate ions and hydrogen (H+) ions. When the blood reaches the lungs, the bicarbonate ion is transported back into the red blood cell in exchange for the chloride ion. The H+ ion dissociates from the hemoglobin and binds to the bicarbonate ion. This produces the carbonic acid intermediate, which is converted back into carbon dioxide through the enzymatic action of CA. The carbon dioxide produced is expelled through the lungs during exhalation. So the correct option is B.
B. HCO3-
Reason: A large amount of carbon dioxide molecules are carried in the form of a bicarbonate ion which is part of the bicarbonate buffer system. In this system, carbon dioxide diffuses into the red blood cells. Carbonic anhydrase (CA) within the red blood cells quickly converts the carbon dioxide into carbonic acid (H2CO3), an unstable intermediate molecule that immediately dissociates into bicarbonate ions and hydrogen (H+) ions. When the blood reaches the lungs, the bicarbonate ion is transported back into the red blood cell in exchange for the chloride ion. The H+ ion dissociates from the hemoglobin and binds to the bicarbonate ion. This produces the carbonic acid intermediate, which is converted back into carbon dioxide through the enzymatic action of CA. The carbon dioxide produced is expelled through the lungs during exhalation. So the correct option is B.
Suggest Corrections
0
Similar questions
Q.
5% of CO2 is dissolved in ___(i)____. Another form in which CO2 is transported is when it combines with hemoglobin and this form is called ___(ii)____hemoglobin. CO2 entering the erythrocytes reacts with water to form carbonic acid in the presence of ____(iii)_____. Carbonic acid is an intermediate step; it dissociates to form a hydrogen ion (H+) from the carbonic acid, leaving___(iv)____ dissolved in the blood.
View More
Join BYJU'S Learning Program
Explore more
Join BYJU'S Learning Program
