Exercise and oxygen dept

• What is the main focus of the video?

  How exercise affects the human body
• Why does exercise increase the need for respiration?

  Exercise requires more energy for muscle movement
• What happens to breathing rate during exercise?

  It increases to supply more oxygen
• What is the relationship between muscular contraction and respiration?

  Muscular contraction requires energy from respiration
• How does the body respond to increased energy demands during exercise?

  By increasing heart rate and breathing rate
• What happens when oxygen supply cannot meet energy demands during intense exercise?

  Cells switch to anaerobic respiration
• What is a byproduct of anaerobic respiration?

  Lactic acid
• What sensation is caused by lactic acid buildup in muscles?

  A burning sensation
• How does the body eliminate lactic acid after exercise?

  By reacting it with oxygen
• What term describes the oxygen needed to repay lactic acid buildup?

  Oxygen debt
• Where does lactic acid go after exercise?

  To the liver for conversion to glucose
• What are the two main measurements to investigate exercise effects on the body?

  • 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 an artery
• What type of questions might be asked about exercise effects?

  Measuring changes before and after exercise
• What happens to breathing and heart rates after exercise?

  • Breathing rate increases
  • Heart rate increases