Question

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

A. conversion of pyruvate to ethanol 

B. conversion of pyruvate of glucose 

C. non-conversion of glucose to pyruvate 

D. conversion of pyruvate to lactic acid

Answer 1

When the muscles get tired, it fails to contract even upon stimulus. Since during vigorous activity more carbon dioxide is produced and oxygen must be supplied to the tissues to overcome the deficiency of oxygen in tissues. In the deficiency of oxygen to breakdown glucose, NAD is reformed and pyruvic acid is converted to lactic acid. Increasing acidity from the accumulated lactic acid and lack of energy causes cramps.