Photosynthesis and Respiration

• 3 uses of the energy transferred in respiration


  • Working your muscles.
  • Growth and repair of cells.
  • Building larger molecules from smaller ones i.e. proteins from amino acids
• Anaerobic respiration in animals

  Glucose to Lactic acid
• Sport involving anaerobic respiration


  • Sprinting
• Anaerobic respiration in plants and fungi

  Glucose to Carbon dioxide and Ethanol
• Photosynthesis


  Carbon dioxide and water goes to glucose and water
• Water loss from lower surface of leaves


  Process by which it occurs
• Factors that increase the rate of photosynthesis

  • light intensity,
  • carbon dioxide concentration,
  • temperature.
• The word equation for aerobic respiration is glucose + oxygen → carbon dioxide + water + energy released
• Why is respiration important?

  Respiration is important because it produces energy that is necessary for the functioning of the body. It provides oxygen to the cells and expels toxic carbon dioxide. When oxygen reaches the cells, this oxygen breakdown glucose which is present in digested food, and releases energy.
• Aerobic respiration: Respiration is a chemical reaction which occurs in every one of the cells in the human body. It releases energy stored in glucose and without it, these cells would die. Aerobic respiration occurs in the presence of oxygen.
• Anaerobic Respiration:

  Respiration is a chemical reaction which takes place in all livings cells and releases energy from glucose. Anaerobic respirationoccurs without oxygen and releases less energy but more quickly than aerobic respiration. Anaerobic respiration in microorganisms is called fermentation.
• Word equation for anaerobic respiration: Glucose + oxygen ---> carbon dioxide + water
• What is Oxygen Debt


  a temporary oxygen shortage in the body tissues arising from exercise
• How can you tell if pond weed is carrying out photosynthesis?

  By looking for bubbles of oxygen in the water around it.During photosynthesis, pondweed uses energy from light to convert carbon dioxide and water into sugar and oxygen.The oxygen is released as bubbles from the plant.