Biology 1
- Created by: frankie306
- Created on: 16-02-15 16:19
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- Keeping healthy
- diet and exercise
- A balanced diet contains to correct amount of food
- Water-
- soup, fruit
- allows Chemical reactions to take place
- Fibre
- cereal, brown bread
- -helps digestion by cleaning intestins
- Carbs-
- bread, cereals, pasta
- Energy
- Proteins-
- meats, nuts, dairy
- Growth + repair of cells
- Fats-
- Chocolate, dairy, crisps
- store of energy
- Vitamins and minerals
- fruit and veg
- aid bodily functions
- Water-
- Different people = different amounts of energy
- more exercise = more food = more energy
- Metabolic rate
- Rate of chemical reactions in cells
- varies for different people
- A balanced diet contains to correct amount of food
- Weight problems
- more energy than needed = fat
- Obesity = extremely larger than what is proper
- BMI= body mass index
- measures body mass
- Tests for obesity/weight problems
- Inherited factors
- Metabolic rate
- Cholesterol
- HDL=high density lipoprotien= good
- carried towards liver
- LDL=low density lipoprotien = bad
- carried towards heart
- heart disease
- lowered by statins
- heart disease
- carried towards heart
- HDL=high density lipoprotien= good
- heart disease
- lowered by statins
- Pathogens and disease
- Pathogens
- micro-organisms that cause disease
- e.g. bacteria + viruses
- reduce of spreading
- washing hands
- Ignaz Semmelweis
- in hospitols
- Ignaz Semmelweis
- washing hands
- Pathogens
- Vacinations
- contains dead/inactive cells
- these are recognised and attacked
- controls infection
- prevents epidemic
- bad reactions
- don't always work
- contains dead/inactive cells
- drugs
- painkillers
- relieve pain/reduces symptoms
- antibiotics
- kills/prevents growth of bacteria
- don't destroy viruses
- bacteria somtimes mutate and become resistant
- painkillers
- defence mechanisms
- skin
- mucus
- covers linings of lungs and tubes
- traps pathogens
- clotting of the blood
- white blood cells
- ingesting microorganisms
- producing antibodies
- unique
- producing antitoxins
- drugs and disease
- antibiotics
- kill bacteria in body
- do not destroy viruses
- hard to kill virus without harming cells
- Penicilin
- Discovered by Alexander Fleming
- discovered in 1928
- paracetamol
- relieves symptoms
- antibiotics
- Growing bacteria
- Uncontaminated culture of microorganisms can be grown using sterilised peri dishes and agar
- sterilise inoculating loop before use and seal the lid
- left at 25 degrees for a few days
- uncontaminated cultures are needed to investigate the effect of hceicals e.g. disinfectants
- kept at 25 degrees
- diet and exercise
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