Answer
a. He is breathing heavily because his muscles consumed a lot of oxygen during the jog, and his body has become oxygen deficient.
b. Initially during exercise, our muscles use aerobic pathways, but as exercise is prolonged, the oxygen in the body becomes depleted and anaerobic pathways become more prevalent.
c. Due to his long jogging, Eric's body started to use an anaerobic pathway, which produces lactic acid as a byproduct. This lactic acid is causing aching and weakness in his muscles.
Work Step by Step
Same as above.
