a) Basal Metabolic Rate (BMR)
this is the energy required when the body is completely at rest
used to carry out breathing, heartbeat, circulation of blood and other basic reactions
also used in maintaining body temperature at constant
all movements or physical work e.g. walking, eating required more energy.
b) Occupation
means activity occurring everyday
everyday activity determines energy requirement
People doing heavy work like digging require more energy than office workers.
c) Age
children carry out many activities and also have more cell division than adults
their BMR is therefore higher than for adults
as they grow older, they become less active and their energy requirements decrease
d) Body size
small bodied people have a large surface area to volume ratio
their bodies lose more heat energy to the surrounding
they therefore require more energy-giving foods
this is the opposite for big bodied people
e) Sex
most males are more muscular than females
they also do heavier work than females hence require more energy
females do lighter work hence require less energy
f) Climate
in warm climate the body requires less energy
in low temperatures the body requires more energy to maintain body temperature
OR
a) Young people are actively/ rapidly growing hence require more energy than older people for cell division.
b) Manual workers require more energy equivalent to work done than sedentary workers
c) males are more muscular hence require more energy than females to maintain every cell
johnmulu answered the question on May 1, 2017 at 13:40
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