12.1-2

Question 1

How to stay away from diseases?

Answer 1

Have a healthy lifestyle & good personal hygiene.

Question 2

How to keep our body healthy?

Answer 2

Eating a variety of food in right amounts and proportions

Question 3

What can we do to help our body stay strong?

Answer 3

Doing an appropriate amount of physical activity.

Question 4

How to keep our mental health good?

Answer 4

Sleep and rest enough, also stay away from avoid smoking, alcohol and drugs.

Question 5

Name all 7 types of food substances.

Answer 5

Carbohydrates, lipids, proteins, minerals, vitamins, dietary fibre and water.

Question 6

Which 3 of the F.S. provide us w energy?

Answer 6

Carbohydrates, lipids, proteins.

Question 7

Describe the differences between sugar and starch.

Answer 7

sugar has 4 main types, glucose, fructose, sucrose, lactose. It’s in a simple structure, and has a sweet taste. Also soluble in water.
starch has a complex structure, doesn’t taste sweet and insoluble in water.

Question 8

key functions of carbohydrates.

Answer 8

main energy sources. energy reserve for the body activities.

Question 9

key functions of lipids.

Answer 9

Shock absorber, good heat insulator, energy reserve.

Question 10

key functions of proteins.

Answer 10

growth and repair, make enzymes.

Question 11

Function of calcium and v.d.

Answer 11

keep our bones and teeth strong.

Question 12

function of iron.

Answer 12

make haemoglobin in red blood cell.

Question 13

funtion of iodine.

Answer 13

make hormones in the thyroid glands.

Question 14

funtion of v.a.

Answer 14

make rod cells.

Question 15

function of v.c.

Answer 15

healing of wounds.

Question 16

soluble dietary fibre.

Answer 16

lower blood lipid levels.

Question 17

insoluble dietary fibre.

Answer 17

prevent constipation.

Question 18

lipids’ types(2)

Answer 18

fats and oils

Question 19

when lipids would be used?

Answer 19

insufficient inatke of carbohydrates, and glycogen reserves are used up.

Question 20

what makes a lipid molecule?

Answer 20

a glycerol, and 3 fatty acids.(jellyfish :P)

Question 21

name the diseases of the lack of f.s. below:
proteins, calcium, iron, iodine, v.a., c, d

Answer 21

Kwashiorkor, rickets, anaemia, goitre, night blindness, scurvy, rickets

Question 22

positive test results of glucose/ protein test paper.

Answer 22

colour change according to the concentration of glucose/ protein in the sample.

Question 23

1. the size of food piece decrease

Answer 23

2.surface area increase.

Question 24

Amino acids join to form long chains called…

Answer 24

Polypeptides

Question 25

v.a. and v.d. are…

Answer 25

lipid-soluble

Question 26

The positive result of the lipids test(also name the test.

Answer 26

Grease spot test, lipids leave a permanent translucent spot on the filter paper.