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 movement
• What does muscular contraction require?

  A lot of energy from respiration
• What must increase to supply more oxygen to muscles during exercise?

  The rate and volume of breathing
• 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 quickly
• What is the purpose of increased effort during exercise?

  To supply enough oxygen for aerobic respiration
• When does the body start using 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 must the body do after exercise regarding lactic acid?

  React it with oxygen to remove it
• What is the term for the oxygen needed to remove lactic acid?

  Oxygen debt
• What happens to lactic acid in the liver?

  It reacts with oxygen to form 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 the pulse at 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 during exercise?

  • Breathing rate increases
  • Heart rate increases