Question

Statement 1: After exercising, we feel fatigue.

Statement 2: Our body undergoes anaerobic respiration and produces lactic acid.

• A. Both statements are true. Statement 2 is the correct explanation of Statement 1.
• B. Both statements are true. But Statement 2 is not the correct explanation of Statement 1.
• C. Statement 1 is true. Statement 2 is false.
• D. Statement 1 is false. Statement 2 is true.

Answer 1

The correct option is A

Both statements are true. Statement 2 is the correct explanation of Statement 1.

While exercising, our muscles work too fast and face lack of oxygen. Thus, they carry out anaerobic respiration that produces lactic acid along with energy. Accumulation of lactic acid is responsible for the fatigue we feel.