Year 8 biology 1

• what denatures an enzyme?


  High temperatures and PH away from its optimum
• What is the purpose of the stomach?


  To break down food using digestive enzymes and acids
• Where does most of our nutrient absorption happen?

  In the small intestine
• What is the trachea responsible for?


  Carrying air from the mouth and nose to the lungs
• What is the function of the alveoli?


  Absorbing oxygen and removing carbon dioxide
• Lungs


  Organs responsible for exchanging oxygen and carbon dioxide through respiration.
• Digestive System


  A series of organs that work together to break down food into nutrients that can be absorbed and used by the body.
• Stomach pH


  The highly acidic environment in the stomach, with a pH of around 1.5-3.5, denatures proteins, activates enzymes, and inhibits bacterial growth.
• pH and Enzyme Activity


  Most enzymes have an optimal pH range within which they are most active, and outside of which their activity is significantly reduced or inhibited.