11. Back to
school
carbohydrates proteins lipids
vitamins minerals water
fibre
Water
soluble Fat soluble macrominerals
microminerals
B, C
A,D,E,K
Ca,P,Na,
K,Cl
Fe,I,Zn
Fruits
,vegetables,nuts,
wholemeal grains
Why do we need balanced diet?
•Source of energy & to fulfill daily energy
requirement
•Growth and repair of damaged body tissues
12. BACK
TO
SCHOOL
The necessity for a balanced
diet
1. A balanced diet contains all the major
nutrients which include
carbohydrates, proteins, lipids,
vitamins, minerals, water and
roughage in the correct proportions
and quantity to meet the daily
requirements of the body.
13. BACK
TO
SCHOOL
2.A bomb calorimeter is used
to determine the energy
content of food by burning a
known mass of food in the
presence of oxygen.
14. Back to
school
3.The energy value of a food is the amount
of heat generated from the combustion of
one gram of food and is measured in joule
per gram.
16. Back to
school
4. Factors affecting daily energy
requirement of human body.
Age
-Growing children and
teenagers need more
energy compared to
adults.
- The metabolic rate in
growing children and
teenagers is higher than
adults because they
need more energy for
growth.
Sex
- A male adult needs more
energy than a female
adults of the same size
and age.
- The metabolic rate in
male adult is higher than a
female adult because they
need more energy for the
development of the body.
Occupations &
Climate
An active person who
does heavy work needs
more energy than a
person who is
moderately active.
People living in cold
countries need more
energy to maintain body
temperature compared
to those living in the
tropics.