Response to Exercise

• What is the main focus of the video?

  How exercise affects the human body
• Why do our bodies need to carry out more respiration during exercise?

  To provide energy for muscle contractions
• What happens to our breathing rate during exercise?

  It increases to supply more oxygen
• What is the downside of increased breathing during exercise?

  It requires more energy to move lung muscles
• What happens to heart rate during exercise?

  It increases to pump oxygen faster
• What is aerobic respiration?

  Respiration that requires oxygen
• When does the body switch to anaerobic respiration?

  When there isn't enough oxygen during intense exercise
• What is a major drawback of anaerobic respiration?

  It produces lactic acid
• What sensation does lactic acid buildup cause?

  A burning sensation in muscles
• What is oxygen debt?

  The need to repay oxygen after exercise
• How does the body eliminate lactic acid after exercise?

  By reacting it with oxygen in the liver
• What does the blood do with lactic acid after exercise?

  It carries it to the liver
• What are the two main measurements to investigate exercise effects?

  • Breathing rate
  • Heart rate
• How do you measure breathing rate?

  Count chest rises and falls in one minute
• How do you measure heart rate?

  By measuring pulse on wrist or neck
• What happens to the body during intense exercise?

  • Increased respiration for energy
  • Increased breathing and heart rate
  • Switch to anaerobic respiration if oxygen is low
  • Lactic acid buildup causing muscle burning
  • Oxygen debt created post-exercise
• What type of questions might be asked about exercise effects?

  Measuring changes before and after exercise