Biology unit 1 - keeping healthy

Diet and exercise

• Healthy diet- one that the right balance of food groups, protein to repair and replace cells and mineral ions ect
• If a person has unequal amounts of each group the person becomes MALNOURISHED
• If the intake of energy is more than the amount of energy used in the body then that person becomes over weight
• if the intake of energy is less than the amount used then that person becomes underweight
• metabolic rate- the speed at which chemical reactions take place in your cells
• muscle mass and inheritance can affet metabolic rate

• Long term obesity can lead to type 2 diabetes, heart attacks and heart failure- can be solved by less of bad food groups and more exercise
• people who are anorexic suffer from defiency disease e.g iron

• Good cholestrol needed for your cell membrane but bad cholestrol can lead to heart disease
• foods rich is saturated fat raise cholestrol level in blood
• exercise lowers cholestrol

• Pathogens- harmful microorganisms which cause infectious disease e.g bacteria
• the…