Question

Muscles get fatigue due to accumulation of

• A. lactic acid
• B. ATP
• C. phosphate molecules
• D. $CO_2$

Answer 1

Answer: (A)

lactic acid

Answer 2

Lactic acid a compound that forms in the cells as the end-product of glucose metabolism in the , absence of oxygen. During strenous exercise pyruvic acid is reduced to lactic acid, which may accumulate in muscles and cause cramp (fatigue).