Exercise

• What is the primary purpose of respiration in humans?

  To provide energy for bodily functions
• What are the two types of respiration mentioned?

  Aerobic and anaerobic respiration
• Why does the body need more energy during exercise?

  For muscle contraction and increased activity
• How does aerobic respiration change during exercise?

  It increases to meet energy demands
• What happens to the breathing rate during exercise?

  It increases to supply more oxygen
• What is the effect of exercise on heart rate?

  Heart rate increases to pump blood
• What problem can occur when exercising hard?

  Not enough oxygen can reach the muscles
• What occurs during anaerobic respiration?

  Incomplete oxidation of glucose occurs
• What chemical builds up in muscles during anaerobic respiration?

  Lactic acid builds up in the muscles
• What effect does lactic acid have on muscles?

  It causes muscle fatigue and inefficiency
• What is oxygen debt?

  The extra oxygen needed after exercise
• Why do people breathe rapidly after exercise?

  To supply oxygen for lactic acid removal
• Where is lactic acid transported after exercise?

  To the liver for conversion back to glucose
• What is required to remove lactic acid from cells?

  Oxygen is required for lactic acid removal
• What happens in the body during exercise?

  • Increased energy demand for muscle contraction
  • Aerobic respiration increases for more oxygen
  • Breathing rate and volume increase
  • Heart rate increases to pump oxygenated blood
  • Anaerobic respiration occurs if oxygen is insufficient
• What are the consequences of prolonged anaerobic respiration?

  • Lactic acid buildup in muscles
  • Muscle fatigue and inefficiency
  • Oxygen debt created
  • Need for extra oxygen post-exercise
• What is the process of lactic acid removal after exercise?

  1. Lactic acid transported out of muscles by blood
  2. Taken to the liver
  3. Converted back to glucose
  4. Requires oxygen for the conversion