Exercise

• Increase of respiration when exercising

  -muscles need energy to contract so need more respiration

  -increased respiration in cells means more oxygen needed so higher breathing rate and heart rate

  -vigorous exercise causes anaerobic respiration
• Anaerobic respiration problems

  -lactic acid build up causes cramps

  -causes muscle fatigue and then stop contracting efficiently
• Oxygen debt caused by anaerobic respiration

  -it is the amount of extra oxygen needed to react with the build up of lactic acid to remove it from cells

  -keep breathing hard after exercise stops to get more oxygen

  -blood that enters the muscles transports lactic acid to the liver which converts it back to glucose