Diet

Question 1

what is a balanced diet

Answer 1

it is a diet with the right amount of energy

all 7 kinds of food in the right proportions

Question 2

ratio of energy value of carbohydrate : protein : lipid

Answer 2

1 : 1 : 2

Question 3

factors affecting our dietary requirements (1)

Answer 3

age

children grow faster than adults

children have more heat loss due to large surface area to volume ratio

Question 4

factors affecting our dietary requirements (2)

Answer 4

pregnancy / breast-feeding

pregnant woman need to support the growth of baby

breast-feeding women need more nutrients and energy for milk production

Question 5

factors affecting our dietary requirements (3)

Answer 5

activity

labour worker has more physical activities than office worker

Question 6

overnutrition

Answer 6

eating too much energy-rich food
e.g. energy intake is greater than energy expenditure

obesity

lead to high blood pressure, heart attack and diabetes

Question 7

undernutrition

Answer 7

lack of protein in diet

kwashiorkor

low body weight
swollen abdomen

insufficient energy intake
i.e. energy intake is smaller than energy expenditure

anorexia nervosa

leads to osteoporosis, kidney damage