Why do people get hungry ? Hunger is nature's
way of telling us to eat. Our bodies ___1___
food so that our brains can think, our hearts can beat and our
muscles can work. ___2___ we
are hungry, we have difficulty in concentrating and may become
___3___ or even
light-headed. Our stomachs may growl and make all sorts of
embarrassing noises. Once we have satisfied our hunger, ___4___
symptoms disappear. How do we know when we ___5___
enough ? The body ___6___
carbohydrates into sugar called glucose which ___7___
to the cells through the blood. A chemical called insulin helps
the cells ___8___ the sugar.
The insulin releases a chemical ___9___
serotonin in the brain and this chemical tells the body that it
has had enough food. ___10___
you get the satisfied feeling and are not hungry anymore. |