A balanced diet includes everything needed to keep the body healthy
If you exercise more, you need less energy in your body
Why do people become obese?
They have taken in more energy than they have used
They don't do any exercise
Starving people can walk about easily
Why does a pregnant woman need more energy than a normal woman?
They're carrying more weight and have to provide for the baby
Because they are under a lot of pressure
What is a metabolic rate?
Eating loads without getting fat
A measure of how quickly the chemical reactions in cells release energy from food
A pathogen is a tiny microorganism that causes infectious disease
Viruses reproduce inside cells
Toxins do not make you feel Ill
Name two problems linked with obesity
Cancer and heart disease
High blood pressure and heart disease
Tiredness and low energy
Why must we eat food?
If we don't, we will starve
You need to eat food to release the energy you need to live
To avoid hunger
The body prevents most pathogens getting in
White blood cells destroy antigens
Medicines kill all pathogens that cause disease
Antibiotics can destroy viruses
Why can't antibiotics kill viruses?
They can
Because viruses reproduce inside the body and any treatment could damage the body cells
Who discovered penicillin?
Ghandi
Pythagoras
Alexander Fleming
