biology excercise

• What is the purpose of increased breathing rate during exercise?

  To take in more oxygen for aerobic respiration and exhale more carbon dioxide
• What happens to glycogen during increased physical activity?

  Glycogen is converted to glucose
• What is meant by "insufficient oxygen" during exercise?

  It refers to the lack of oxygen available for aerobic respiration
• What happens to heart rate after exercise?

  Heart rate slowly decreases
• What is "oxygen debt"?

  It is the amount of oxygen needed to break down lactic acid
• Why is oxygen needed to react with lactic acid?

  To remove lactic acid from cells
• Where is some lactic acid transported after exercise?

  To the liver
• What happens to lactic acid in the liver?

  It is converted back to glucose
• What are the physiological changes during and after exercise?

  • Increased breathing rate for more oxygen intake
  • Conversion of glycogen to glucose
  • Insufficient oxygen for aerobic respiration
  • Heart rate decreases after exercise
  • Oxygen debt occurs to break down lactic acid
  • Lactic acid is transported to the liver for conversion back to glucose