Q. Which one among the following gases readily combines with the haemoglobin of the blood?
1 Methane
2 Nitrogen dioxide
3 Carbon monoxide
4 Sulphur dioxide
Ans: 3
Q. In human, which one among the following, with reference to breathing, is correct?
1 During inhalation, diaphragm relaxes
2 During exhalation thorax cavity expands
3 During inhalation, intrapleural pressure becomes more negative
4 Unlike inhalation, normal exhalation is an active process
A