Question

Sometimes when we do heavy exercise, anaerobic respiration takes place in our muscle cells. What is produced during this process?

Options

• Alcohol and lactic acid

• Alcohol and CO₂

• Lactic acid and CO₂

• Lactic acid only

Answer 1

Lactic acid only

Explanation:

When we do heavy exercise our body does not get enough oxygen to produce the required energy. To get additional energy, anaerobic respiration occurs within our muscle cells. In this process, there occurs a partial breakdown of glucose to produce lactic acid. The accumulation of lactic acid in the body causes muscular cramps.