Question

Gwen is investigating how exercise affects the rate at which she can squeeze a ball. After several minutes, she begins to experience muscle soreness and fatigue. She knows that this means her muscles are beginning to run out of oxygen. Which process is likely causing the soreness in her muscle cells?
A. Lactic acid fermentation
B. Photosynthesis
C. Alcohol fermentation
D. Krebs cycle

Answer 1

Answer:

Lactic acid fermentation.

Explanation:

During strenuous muscle activity the liver converts glucose or any other sugars into ATP, anaerobically. This causes oxygen debt, due to the accumulation of lactic acid and carbon dioxide, thats needs to be repaid after exercising.

After exercise the muscles uses oxygen to oxidise the high level of lactic acid, resulting in painful muscles.