Digestion Enzymes 1 Label the following diagram to

Digestion & Enzymes 1. Label the following diagram to show the main organs in the digestion system: (3) 2. The stomach contains muscular tissue, glandular tissue and epithelial tissue. Write down the role each of these tissues play in the stomach. (3) a) Muscular tissue: ___________________________________________ b) Glandular tissue: __________________________________________ c) Epithelial tissue: __________________________________________ 3. Match the following organs to the correct functions: (5) Absorbs water from undigested food Liver Stomach Food is churned to break down large insoluble molecules into smaller soluble molecules Small intestine Produces bile to help the digestion of lipids Pancreas Large insoluble molecules broken down to smaller, soluble molecules and absorbed into the bloodstream Large intestine A gland which secrets digestive enzymes which help to break down the food molecules

5. Define the role and structure of an enzyme (3) ___________________________________________________ 6. Describe the effect of a changing temperature or p. H on enzyme action (3) ___________________________________________________ 7. For the following enzymes, state the substance they break down, the substances that are produced as a result of this reaction and where the reaction takes place: (3) a) Amylase_________________________ b) Protease_________________________ c) Lipase_________________________ Total marks: _____ / 20 Grade: ______ R/A/G: _______ Extra Challenge Task Option A – Carbohydrates, proteins and fats are the building blocks of life. Create a fact file for each substance, describe the types of food you would find them in and the why they are so important for your body. Option B – Plan an investigation to test the effect of a changing p. H on the rate of reaction of amylase

Digestion & Enzymes 1. Label the following diagram to show the main organs in the digestion system: (3) Oesophagus Liver Large intestine Stomach Pancreas Small intestine Anus 2. The stomach contains muscular tissue, glandular tissue and epithelial tissue. Write down the role each of these tissues play in the stomach. (3) a) Muscular tissue: Churn food and digestive juices together b) Glandular tissue: Secrete digestive juices, containing enzymes, to break down the food c) Epithelial tissue: Layer of cells which covers the inside and outside of the organ 3. Match the following organs to the correct functions: (5) Absorbs water from undigested food Liver Stomach Food is churned to break down large insoluble molecules into smaller soluble molecules Small intestine Produces bile to help the digestion of lipids Pancreas Large insoluble molecules broken down to smaller, soluble molecules and absorbed into the bloodstream Large intestine A gland which secrets digestive enzymes which help to break down the food molecules

5. Define the role and structure of an enzyme 6. 7. (3) An enzyme is a biological catalyst which speeds up the rate of reaction. Enzymes are large protein molecules which are folded to produce a molecule with an active site that has a unique shape. Describe the effect of a changing temperature or p. H on enzyme action (3) As the temperature increases the rate of reaction initially increases until the temperature reaches it’s optimum. When the temperature surpasses the optimum the enzyme begins to denature and stops working. Each enzyme has an optimum p. H, if a change in p. H can cause the active site of the enzyme to change, therefore denaturing and stopping it from working. For the following enzymes, state the substance they break down, the substances that are produced as a result of this reaction and where the reaction takes place: (3) a) Amylase – This enzyme breaks down starch into glucose, this happens in the mouth and in the small intestine b) Protease – This enzyme breaks down protein into amino acids, this happens in the stomach and small intestine c) Lipase – This enzyme breaks down fats into fatty acids and glycerol, this happens in the small intestine Grading: I will give work out a percentage for the students work and award grades based on the following percentage boundaries: • • • 80% - 9 75% - 8 70% - 7 65% - 6 60% - 5 50% - 4 40% - 3 35% - 2 30% - 1 R/A/G: If they have achieved their target grade or above they receive a GREEN. If they have received one below their target grade then I award an AMBER. If they achieve more than one grade below their target grade they receive a RED.