Biology Unit 1 - B1

all the topics in the first unit of biology

HideShow resource information

diet and energy

balanced diet is key to keeping healthy, and the diet needs to contain some of these nutrients:

carbohydrates, fats and protein for energy

small amounts of vitamins and mineral ions for keeping healthy

without a balanced diet, you may become malnourished

metabolic rate - rate at which chemical reactions take place in your cells

can be affected by genes - inherited from parents

higher the metabolic rate, the better - increases through excercise

fatty foods - one gram of fat releases twice as much energy as one gram of carbohydrate

proteins used for functions of growth and repair - not very often used for energy, but they can be

1 of 3


high blood cholesterol levels - increases risk of developing plaques in artery walls

blood clots can arise from built up plaque in the arteries - can lead to heart attacks

eating saturated fats raises blood cholesterol levels

unsaturated fats can reduce blood cholesterol levels

low-density lipoprotein (LDL) - cholesterol which is 'bad' and can cause heart disease

high-density lipoprotein (HDL) - cholesterol which is 'good' - can protect against heart disease by helping to remove cholesterol from the walls of blood vessels

2 of 3

pathogens and infectiomw

3 of 3




this information is amazing

a big thankyou for the person who uploaded it :)




Similar Biology resources:

See all Biology resources »