1. STORAGE OF DIGESTED FOOD

2. 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?

3. 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.

4. 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.

5. 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.

6. 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.

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

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

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

10. 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.

11. 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

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

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

15. How an enzyme works : the lock and key model

16. 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.

17. 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