Lack of oxygen in muscles often leads to cramps among cricketers. This results due to:

When we breathe out,why does the air passage not collapse?

When a sportsman runs,he gets muscle cramps. Why?

After a vigorous exercise,you may experience cramps in your leg muscles. Why does this happen?

The correct sequence of anaerobic reactions in yeast is:

Which of the following statement$(s)$ is (are) true about respiration?
$(i)$ During inhalation,ribs move inward and diaphragm is raised
$(ii)$ In the alveoli,exchange of gases takes place i.e.,oxygen from alveolar air diffuses into blood and carbon dioxide from blood into alveolar air
$(iii)$ Haemoglobin has greater affinity for carbon dioxide than oxygen
$(iv)$ Alveoli increase surface area for exchange of gases