Human Digestive System — AQA GCSE Combined Science: Synergy 8465
AQA GCSE Combined Science: Synergy · 8465
Human Digestive System
What you need to know
Explain the vital roles of sugars, amino acids, fatty acids, and glycerol in both the synthesis and breakdown of complex carbohydrates, lipids, and proteins.
Describe the digestive system as an organ system that utilizes specific enzymes to break down large, insoluble food molecules into smaller, soluble ones for blood absorption.
Detail how carbohydrases break down starch into glucose for cellular respiration, and how lipases break down lipids into glycerol and fatty acids for energy storage.
Explain how proteases break down proteins into amino acids for the synthesis of new proteins necessary for cellular growth and repair.
Describe how the liver processes unwanted amino acids into urea, which is transported by the blood to the kidneys for excretion in urine.
Perform qualitative practical tests using Benedict's solution for sugars, iodine for starch, and Biuret reagent for proteins.
