STORAGE OF DIGESTED FOOD

We know that food is digested and carried around in the blood. From the blood, cells absorb the nutrients. Starch is digested into glucose. Protein is digested into amino acids. Fat is digested into fatty acids and glycerol. Can you guess which food contain these?

Glucose Excess glucose is changed to glycogen in the liver. Some are stored in the liver and the rest in muscles. When blood sugar level is low, the liver changes glycogen back to glucose. Muscle glycogen is used up by the muscle during muscular activity. Glycogen in liver is only stored for 6 hours. Excess is converted to fat.

Amino acids Used for making important proteins needed by our body. Excess are not stored in the body. They are deaminated by the liver. What is deamination? It is a process where amino acids are converted into glycogen by the liver. The amino part is removed and changed to urea, which is excreted by the kidneys.

Fat There is no limit to the amount of fat stored. It has high energy value and is effective as a long term storage. Fat is stored in the abdomen, round the kidneys and under the skin. These are known as fat depots.

Body Weight The rate at which glucose is converted into glycogen and fat is controlled by hormones. When intake is more than what the body needs, the extras will be stored as fat. Why do people react differently to the amount of food consumed??? Some put on weight easily and some dont. Generally, you put on weight when you eat more than what your body needs. However, the balance of hormones in your body and your genetic makeup also might play a role in this.

WALT know the food groups Class discussion : Why do we need food?

We need food for growth as a source of energy for replacement of worn and damaged tissues

Can you name these food groups? Do you know the three food classes?

BALANCED DIET A balanced diet must contain enough carbohydrates and fats to meet out energy needs. Needs to have essential proteins for growth and repair of new cells. It needs to have vitamins, mineral salts, plant fibre and water. Mineral salts include iron, calcium, iodine and phosphorus. It is important to have a balanced and healthy diet.

Im DGE-Ernährungskreis werden 7 Gruppen unterschieden: Getreide, Getreideprodukte, Kartoffeln Gemüse, Salat Obst Milch und Michprodukte Fleisch, Wurst, Fisch und Eier Öle und Fette Getränke

WALT know what an enzyme is Task : Draw this in your folder

An example : Can you identify the enzyme, the substrate and the product?

How an enzyme works : the lock and key model

ENZYMES - QUIZ What is an enzyme? State two factors that affect the function of an enzyme. pH and temperature. Explain why digestive enzymes are different to enzymes in the respiratory system? Name the enzyme that reacts with Starch Protein Fat 4. What is the end product of starch, protein and fat after the enzymes have reacted? 5. State the part of the digestive system where this enzymes are produced. 6. Give an example of an enzyme that works best in an acidic condition.

ENZYMES QUIZ ANSWERS 1. Protein that act as a biological catalyst. 2. Digestive enzymes are secreted and released out of the cell whereas respiratory enzymes work within a cell. 3. Starch – amylase Protein – protease Fat – lipase 4. Starch – glucose Protein – amino acids Fat – fatty acids and glycerols 5. Amylase – salivary gland, pancreas, small intestine Protease – stomach, pancreas, small intestine Lipase- pancreas, small intestine 6. Protease