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5112261
B1.1 Keeping Healthy
Descripción
GCSE Biology Mapa Mental sobre B1.1 Keeping Healthy, creado por ELeanor Turner el 12/04/2016.
Sin etiquetas
biology gcse
biology
gcse
aqa
biology unit 1
keeping healthy
revsion
mind map
additional science
aqa gcse
b1.1 - keeping healthy
science
gcse additional science
biology questions and answers
exercise and health
biology
gcse
Mapa Mental por
ELeanor Turner
, actualizado hace más de 1 año
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Creado por
ELeanor Turner
hace más de 8 años
23
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Resumen del Recurso
B1.1 Keeping Healthy
Diet and Exercise
Healthy diet
Right balance of the different foods you need and the right amount of energy
Carbohydrates, fats and proteins
Release energy
Build cells
Vitamins and mineral ions
Small amounts
Malnourished
Diet is not balanced
Overweight
Underweight
Deficiency diseases
Type 2 diabetes
Exercise
Lose mass when the energy content taken in is less than the amount of energy expended
Exercise increases amount of energy expended
Makes healthier
Metabolic rate
Rate at which chemical reactions in the cells take place
Inherited factors
Also affects health, e.g. cholesterol level
Amount of exercise
Proportion of muscle to fat in your body
Defence against infectious disease
Pathogens
Bacteria and virus
Reproduce rapidly
Produce toxins
Immune system
White blood cells
Ingest pathogens
Produce antibodies
Destroy particular bacteria or viruses
Specific antibodies made
Production of specific antibodies stimulated if the same pathogen is detected in the future
Lead to immmunity
Produce antitoxins
Counteract toxins
Semmelweis
Recognised importance of hand washing
Insisted doctors washed their hands before examining patients
Greatly reduced the number of deaths from infectious disease in his hospital
Treatments
Painkillers
Relieve symptoms, do not kill the pathogens
Antibiotics
Penecillin
Kill bacteria
Can't kill viruses
Viruses live and reproduce inside cells
Can't kill without destroying cell too
Overuse and inappropriate use increases antibiotic resistance
Result of natural selection
Mutations
New strains
Pathogens with the resistant strain survive and reproduce
Population of resistant strain increases
Now used mainly for non-serious infections to slow down the rate of developing resistant strains
Necessitates the development of new antibiotics
Vaccinations
Introduction of a small quantity of a dead or inactive pathogen into the body
Stimulates production of antibodies
Destroy the pathogen
Immune to further infections by that microorganism
Body can rapidly respond and reproduce the antibodies needed as they are already made
MMR
Cultures
Kept at 25 degrees celsuis
Investigating the action of disinfectants and antibiotics
Petri dishes and culture media must be sterilised
Inoculating loops used to transfer microorganisms to the media, need to be sterilised by passing through flame
Lid secured with adhesive tape to prevent contamination
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