Exercise & Oxygen Debt

• What is the main focus of the video regarding exercise and the human body?

  The video explores how exercise affects the human body's respiration and energy needs.
• Why does exercise require more cellular respiration?


  Exercise requires more energy due to increased muscle movement and contraction.
• What do muscles require for contraction during exercise?

  Muscles require energy obtained from respiration.
• How does the body respond to the increased energy demand during exercise?


  The body increases the rate of breathing and the volume of each breath.
• What is the downside of increased breathing during exercise?


  It requires more energy to move the muscles around the lungs.
• What happens to the heart rate during exercise?


  The heart rate increases to pump oxygen around the body more quickly.
• What is aerobic respiration?


  Aerobic respiration is the process of producing energy with the use of oxygen.
• When does the body switch to anaerobic respiration?


  The body switches to anaerobic respiration when there is insufficient oxygen during intense exercise.
• What is a major disadvantage of anaerobic respiration?


  It produces lactic acid, which can build up in tissues.
• What sensation is caused by lactic acid buildup in muscles?

  Lactic acid buildup causes a burning sensation in the muscles.
• What is oxygen debt?

  Oxygen debt is the amount of oxygen needed to remove lactic acid after exercise.
• How does the body repay oxygen debt after exercise?


  The body reacts lactic acid with oxygen to convert it back to glucose.
• Where does the blood carry lactic acid after exercise?


  The blood carries lactic acid from the muscles to the liver.
• What are the two main measurements to investigate the effects of exercise on the body?

  • Breathing rate
  • Heart rate
• How can you measure someone's breathing rate?


  You can count how many times their chest rises and falls in one minute.
• How can you measure heart rate?


  You can measure your pulse by placing two fingers on an artery in the wrist or neck.
• What type of questions might be asked regarding exercise effects?


  Questions may involve measuring rates before and after exercise and explaining changes.
• What happens to breathing and heart rates during exercise?

  • Breathing rate increases
  • Volume of each breath increases
  • Heart rate increases