biology triple award B1 revision aqa
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- Created on: 10-06-14 11:45
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- biology B1 trtiple award aqa
- diet and energy
- fatty foods
- one gram of fat releases almost twice as much energy as one gram of carbohydrate orn one gram of protein
- protiens are not usually a major source of energy for the body because they are used for more important functions of growth and repair
- cholesteral
- eating saturated ats raises blood cholesteral levels
- some peoples bodies are better at keeping cholesteral levels low in their blood
- this is inherited from the parents
- good and bad cholesteral
- there are 2 types of cholesteral
- low-density lipoprotien (LDL)
- this is bad as it causes heart disease
- high-density lipoprotien (HLD)
- this is good as it protects against heart disease
- does this by removing cholesteral from the walls of blood vessels
- this is good as it protects against heart disease
- low-density lipoprotien (LDL)
- there are 2 types of cholesteral
- fatty foods
- pathogens and infections
- disease
- micro-organsims that cause disease are called pathogens
- bacteria reproduces rapidly inside the body
- they may produce toxins that make people feel ill
- viruses reproduce inside a body cell then destroy it when they burst out
- the viruses then invade other cells
- disease
- drugs against disease
- antibiotics
- antibiotics are drugs that kill bacteria
- prescribing antibiotics
- antibiotics
- diet and energy
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