Approximately seventy percent of carbon dioxide absorbed by the blood will be transported to the lungs:
Correct answer: A. As Bicarbonate ions
- A. As Bicarbonate ions
- B. In the form of dissolved gas molecules
- C. By binding to R.B.C
- D. As Carbaminohaemoglobin.
Explanation
(a) : About 70% of CO2 (about 2.5ml per 100 ml. of blood), received by blood from the tissues, enters the RBCs where it reacts with water to form carbonic acid (H 2CO 3 ).
Last updated
About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
Practise Respiration
446 free Respiration MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A cavity bounded by the ribs and diaphragm is called:
A disease caused by gradual breakdown of the thin walls of alveoli is:
A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O2 _.
A large proportion of oxygen remains unused in the human blood even after its uptake by the body tissues. This O2 _.
A surfactant is essential for: