Question

Muscles get fatigued due to accumulation of

• A. Adenosine triphosphate
• B. $C{O}_2$
• C. Lactic acid
• D. Phosphate molecules

Answer 1

The correct option is C Lactic acid

• The Burning of glucose during respiration requires oxygen. When a Muscle is subjected to continuous exercise there will be low availability of oxygen. This leads to the anaerobic breakdown of glucose which results in the formation of lactic acid.
• This accumulation of lactic acid in the muscle causes muscle fatigue.
• Hence Muscles get fatigued due to the accumulation of lactic acid.
• So, the correct answer is 'Lactic acid'.