B1 - Keeping Healthy
- Created by: Emily H
- Created on: 22-04-13 21:03
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- Biology 1 - Keeping Healthy
- Diet & Exercise
- Eat a Balanced diet
- Carbs
- Proteins
- Fats
- Vitamins & Minerals
- Fibre
- Water
- Men and Pregnant women need the most energy.
- Metabolic Rate
- Men have a higher metabolic rate than women
- Exercise increases your metabolic rate
- Eat a Balanced diet
- Weight Problems
- Excess energy is stored as fat
- This can lead to Arthritis, Type 2 Diabetes and Heart Disease.
- Lose weight by reducing the energy intake and increasing the amount of exercise done.
- Malnourishedpeople can develop serious health problems
- Excess energy is stored as fat
- Inheritance, exercise & health
- Metabolic rate and Choleterol levels are inherited
- Exercise increases health
- Reduces weight
- Increases metabolic rate
- Reduces cholesterol
- Pathogens & Disease
- Bacteria and Viruses which cause diseases are Pathogens
- They reproduce inside the body. Bacteria produce toxins
- Ignaz Semmelweis realised diseases were being passed on by doctors.
- Nobody believed him
- MRSA is a n antibiotic resistant disease common in hospitals
- Bacteria and Viruses which cause diseases are Pathogens
- Defence Mechanisms
- Patogens can be spread:
- Droplet infection
- Direct contct
- Food and Drink
- Breaks in the skin
- Prevent microbes getting in
- White blood cells (p. 33)
- Ingestion
- Antibodies
- Antitoxins
- Patogens can be spread:
- Using Drugs to Treat Disease
- Painkillers do not cure illnesses, only relieve the symptoms
- Antibiotics kill bacteria inside the body, but do not harm viruses
- Alexander Flemming discovered Penicillin
- Mould on culture plates killed the bacteria around them
- Crocodiles, fish and honey are being studied to produce new medecines.
- Growing and Investigating Bacteria
- Sterilised Petri dishes, Agar jelly and inoculating rings are used to culture microorganisms
- Incubated at 25oC to reduce the likelihood of harmful bacteria rowing
- Changing Pathogens
- When some pathogens are treated with antibiotics, some mutate to become resistant to that medecine.
- They then reproduce to create a resistant strain
- MRSA developped from over-use of antibiotics. It causes a large number of deaths in hospitals
- When some pathogens are treated with antibiotics, some mutate to become resistant to that medecine.
- Immunity
- Small amounts of dead or inactive pathogens are introduced to the body. White blood cells produce an antibody and remember it if the pathogen returns
- Vaccines have small risks, so many people decide not to have their children vaccinated
- Diet & Exercise
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