Zusammenfassung der Ressource
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