Response to exercise

• What are the physical changes that occur during exercise?

  Increased sweating, panting, and heart rate
• Why do we learn about the reasons behind changes during exercise?

  To understand how our body responds to activity
• How can the bioenergetics workbook assist in revision?

  It contains tasks, pictures, and exam questions
• What is the role of muscle contraction during exercise?

  It increases the demand for energy
• Which type of respiration transfers more energy?

  Aerobic respiration
• What happens to heart rate during exercise?

  Heart rate increases to pump more blood
• What is the effect of increased breathing rate during exercise?

  More oxygen enters the body
• What does increased breathing volume mean?

  Breathing more deeply to take in air
• Why do muscles receive more oxygenated blood during exercise?

  To support more aerobic respiration
• What causes muscle fatigue during vigorous activity?

  Accumulation of lactic acid
• What is lactic acid a byproduct of?

  Anaerobic respiration
• What is oxygen debt?

  The extra oxygen needed to remove lactic acid
• How is lactic acid removed from the body?

  Transported to the liver via blood
• What happens to lactic acid in the liver?

  It is converted back into glucose
• Why do we continue to breathe heavily after exercise?

  To repay the oxygen debt
• What is the equation for removing lactic acid?

  Lactic acid + Oxygen → Glucose
• What is the significance of the term "oxygen debt"?

  It refers to the extra oxygen needed post-exercise
• What happens to glucose during anaerobic respiration?

  It is not fully broken down
• What are the main changes in the body during exercise?

  • Heart rate increases
  • Breathing rate increases
  • Breathing volume increases
• What are the causes and effects of lactic acid buildup during exercise?

  Causes:

  • Anaerobic respiration
  • Insufficient oxygen

  
  

  Effects:

  • Muscle fatigue
  • Soreness
• What is the process of converting lactic acid back into glucose?

  1. Lactic acid is transported to the liver
  2. Lactic acid combines with oxygen
  3. It is converted into glucose
• What is the relationship between aerobic and anaerobic respiration in terms of energy release?

  • Aerobic respiration releases more energy
  • Anaerobic respiration releases less energy due to incomplete glucose oxidation