Necessary Information

Question 1

Water is the main component of what parts of the body?

4

Answer 1

The cell liquid
Blood
Lymph
Digestive juices

Question 2

What is the elemental composition of water ?

Answer 2

Hydrogen and Oxygen in the ratio 2:1 (H2O)

Question 3

What are the properties of water?

9

Answer 3

Colourless 
Odourless 
Tasteless 
Boils at 100 degrees Celsius 
Freezes at 0 degrees Celsius 
Neutral pH7
Excellent solvent 
Can be solid, liquid or gas 
Absorbs and retains heat

Question 4

What are the functions of water?

Answer 4

Quenches thirst
Removes waste products
Makes up 92% of blood plasma
Provides the minerals calcium and fluoride
Regulates body temperature at 37 degrees Celsius
Involved in the hydrolysis of nutrients during digestion
Prevents constipation

Question 5

How does water prevent constipation?

Answer 5

It makes stools soft and easy to pass

Question 6

How does water remove waste from the body?

Answer 6

Waste is removed through the kidneys as urine

Question 7

Water makes up 92% of blood plasma, what function does this carry out?

Answer 7

It transports nutrients, oxygen, carbon dioxide, hormones and enzymes around the body

Question 8

What minerals does water provide?

Answer 8

Calcium and fluoride

Question 9

List four sources of water

Answer 9

Tap or bottles water
Beverages such as milk, tea, coffee and juices
Fruit and vegetables
Soups

Question 10

What is the recommended daily allowance of water?

Answer 10

Two to three litres of water or eight glasses a day

Question 11

Under what circumstances should you increase your intake of water
(4)

Answer 11

Intense physical activity
Lactation
Diarrhoea
Illness e.g. fever