EVERYDAY SCIENCE

Detailed explanation-1: -Explanation: If the exercise is vigorous and/or prolonged, the heart and lungs are unable to supply sufficient oxygen. Muscles begin to respire anaerobically. Lactic acid is produced from glucose, instead of carbon dioxide and water.

Detailed explanation-2: -1: Lactic acid fermentation: Lactic acid fermentation is common in muscle cells that have run out of oxygen. The enzyme used in this reaction is lactate dehydrogenase (LDH).

Detailed explanation-3: -Muscle cells can continue to produce ATP when oxygen runs low using lactic acid fermentation. However, this often results in muscle fatigue and pain.

Detailed explanation-4: -Anaerobic Respiration in Animals In animals, anaerobic respiration produces lactic acid as the glucose is not fully broken down. If the lactic acid builds up it can stop the muscles from working, causing cramp. This lactic acid needs to be broken down.

Detailed explanation-5: -Anything that makes your body use more oxygen than usual can cause your cells to produce lactic acid. A workout, doing yardwork or lugging heavy boxes while you’re helping a friend move can all cause a short-term increase in lactic acid in your body.