exercise

• Exercise


  Requires our bodies to carry out more cellular respiration
• Cellular respiration during exercise

  1. Muscles require more energy

  2. Increased oxygen demand

  3. Increased breathing rate and volume

  4. Increased heart rate
• Insufficient oxygen during intense exercise

  Cells switch to anaerobic respiration
• Anaerobic respiration

  Less efficient than aerobic respiration, produces lactic acid
• Lactic acid buildup during exercise

  Causes a burning sensation in muscles
• Oxygen debt


  Extra oxygen needed after exercise to react with and remove lactic acid
• Removing lactic acid after exercise

  1. Lactic acid carried in blood to liver

  2. Reacted with oxygen to convert back to glucose
• Measuring effects of exercise

  • Breathing rate
  • Heart rate
• Breathing rate measured by counting chest rises and falls per minute
• Heart rate measured by taking pulse on wrist or neck artery