respiration

Question 1

what do we need energy for?

Answer 1

• Muscle contraction
  
  • Protein synthesis
  • Cell division and growth
  • Active transport
  • Passage of nerve impulses
  • Maintenance of a constant body temperature

Question 2

aerobic respiration

Answer 2

• Involves oxygen
  
  • Occurs in the mitochondria
  • Word equation: glucose + oxygen → carbon dioxide + water
  • Balanced chemical equation: C6H12O6 + 6O2 → 6CO2 + 6H2O

Question 3

anaerobic respiration

Answer 3

• Does not involve oxygen
  in muscles:
  - Word equation: glucose → lactic acid
  in yeast:
  - Word equation: glucose → alcohol + carbon dioxide
  - Balanced chemical equation: C6H12O6→ 2C2H5OH + 2CO2

Question 4

Actions taken by the body to remove lactic acid:

Answer 4

• Aerobic respiration in the liver to break down lactic acid into carbon dioxide and water
• Maintaining a higher heart rate even after the exercise is finished to transport the lactic acid in the blood from the muscles to the liver
• Maintaining deeper and faster breathing even after exercise has stopped so that oxygen is supplied to the liver so it can break down the lactic acid

Question 5

oxygen debt

Answer 5

the amount of oxygen needed to break down lactic acid in the liver