Chapter 3 - Food And Nutrition

Question 1

Carbohydrates

Answer 1

Sugar - gives energy
Starch - gives energy
Fibre - prevent constipation

Carbohydrates are made up of long chains of simple sugars

• Pasta
• bread
• potatoes

Question 2

Protein

Answer 2

Growth and repair of body tissues

Protein is made up of long chains of amino acids

• milk
• yoghurt
• eggs

Question 3

Fats

Answer 3

To keep us warm and to give us energy

Made up of 1 molecule of glycerol and 3 attached fatty acids

• cheese
• avocados
• eggs

Question 4

Tissue

Answer 4

A group of cells working together

Question 5

Organ

Answer 5

A group of tissues working together

Question 6

Organ system

Answer 6

A group of organs working together

Question 7

Small intestine

Answer 7

The main part of the digestive system that breaks down the food

Question 8

Liver

Answer 8

Bile comes from the liver and helps breaks the food down

Question 9

Gall bladder

Answer 9

The gall bladder holds bile produced in the liver until it is needed for digesting fatty foods

Question 10

Bile

Answer 10

Contains bile acids and helps turn the food into a liquid and get it into you blood stream

Question 11

Enzyme

Answer 11

Biological catalyst that speed up the rate of reactions in living things

Enzymes are specific. They can only catalyse (break down) one substrate molecule. This is because they have a specific shape called active site

Question 12

Active site

Answer 12

The shape for the substrate to fit into

Question 13

Substrate

Answer 13

A molecule that fits into the active site of an enzyme