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 do we not need much energy when relaxing?

  Because we are not moving
• What happens to energy demand during exercise?

  It increases for muscle contraction
• How does aerobic respiration change during exercise?

  It increases to meet energy demands
• What physiological changes occur to supply more oxygen during exercise?

  Breathing rate and volume increase
• What happens to the heart rate during exercise?

  It increases to pump oxygenated blood
• What problem can occur when exercising hard?

  Not enough oxygen can reach the muscles
• What occurs when there is insufficient oxygen during exercise?

  Anaerobic respiration takes place in muscles
• What is produced during anaerobic respiration?

  Lactic acid is produced in muscles
• What effect does lactic acid have on muscles?

  It causes muscle fatigue and inefficiency
• What must the body do with lactic acid after exercise?

  Remove it from the muscles
• What is the term for the condition created by lactic acid buildup?

  Oxygen debt
• How is lactic acid transported after exercise?

  By the blood to the liver
• What happens to lactic acid in the liver?

  It is converted back to glucose
• Why does the body need extra oxygen after exercise?

  To deal with accumulated lactic acid
• Why do people continue to breathe rapidly after exercise?

  To supply oxygen for lactic acid removal
• What happens in the body during exercise?

  • Increased energy demand for muscle contraction
  • Increased aerobic respiration
  • Increased breathing rate and volume
  • Increased heart rate to pump oxygenated blood
  • Possible shift to anaerobic respiration if oxygen is insufficient
  • Production of lactic acid leading to fatigue
  • Removal of lactic acid creates oxygen debt
• What is oxygen debt and its significance?

  • Oxygen debt is the extra oxygen needed after exercise
  • Required to remove lactic acid from muscles
  • Indicates the body's recovery process