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8167905
B1.1 Keeping healthy
Descripción
This is all of the first chapter of B1
Sin etiquetas
biology
b1
gcse
Mapa Mental por
Rosie Cook
, actualizado hace más de 1 año
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Creado por
Rosie Cook
hace más de 7 años
29
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Resumen del Recurso
B1.1 Keeping healthy
Diet and exercise
Carbohydrates, Proteins, Fats, Vitamins, Minerals, Fibres, Water
Metabolic rate- Speed at which chemical reactions take place in the body
↑ If male, pregnant, younger or an athelete
Weight problems
Obesity
Arthritis, Type 2 diabetes, High blood pressure
Malnourished
Deficiency diseases
Inheritance, Exercise and health
Cholesterol
Needed for cell membranes and hormones
Too ↑- Risk of heart disease
Pathogens and disease
Bacteria - single celled organism
Virus - Smaller
MRSA
Resistant to antibiotics due to overuse.
Ignaz Semmelweis
Women dying from child bed fever. Doctors- Morgue→Maternity but they ≠ wash hands
Keeping Heathy
Droplet infection
Cough/Sneeze Contaminated food + drink
Direct contact
Through break in skin
Breathe in
Mucus- covers lung lining traps
Stomach acid distroys
White blood cells
engulfing pathogens
Producing antibodies
antibodies attach to antigens on the bacteria (unique per pathogen)
Producing antitoxins
Pathogens release toxins which these counteract
drugs vs disease
Bacteria
Antibiotics kill bacteria without harming cells
Viruses
Inside human cells so you would damage yourself
Penicillin
Alexander Flemming
Left culture plates out to gather mould - mould killed Bacteria
Florey + Chain
Used on humans and industrialised
Growing
1) Sterilise inoculating loop
2) dip loop in bacteria and spread across agar
3)seal lid to prevent contamination but not fully prevent anaerobic
school 25°C so not harmful. Industrial < 47°C rapid
Vaccines
Jenner
Dead or weakened forms of disease
E.g MMR -measles mumps and rubella
Recursos multimedia adjuntos
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