Zusammenfassung der Ressource
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