Oxygen Oxygen is required for the release of energy from food molecules (aerobic respiration). Instead of breaking down food molecules completely, muscle cells switch to a form of partial breakdown that does not require oxygen (anaerobic respiration) so that they can continue to generate energy. This partial breakdown produces lactic acid, which results in a sensation of fatigue when it reaches certain levels in the muscles and the blood. Once the vigorous muscle movements cease, the body breaks down the lactic acid, using up extra oxygen to do so. Panting after exercise is an automatic mechanism to 'pay o....

Words In Essay: 2774 Approximate Pages: 11

You are just minutes away from instant access to viewing this paper along with over 35,000 other essays and term papers. What are you waiting for? That paper isn't going to write itself. Join today and get a ton of help with that paper! Membership Options Price Recurring 1 month  subscription $17.95 Y 3 months subscription $34.95 Y 6 months subscription $59.95 N