Zusammenfassung der Ressource
biology B1
Revision
- chapter 1
- what is in our food ?
- a balanced diet has the right amount of
- carbohydrates
- vitimins
and
minerals
- fats
- protiens
- fibre
- water
- whats is bmi & metabolic rate
- weight divided by height times height
- bmi
- metabolic rate learn it well the rate of reactions in your cells
- metabolic rate
- investigating vitamin C
- to compare the amounts of vitamin C in
different drinks
- we need a balanced diet to keep us healthy if we
don't have one we can suffer from a difdediffiancy
desease
- scurvy is a lack of vitamin C which is an example of a
difficancy desease
- pathogens and diseases
- what are
pathogens and
how do they
cause diseases
- microorganisms are too small to see
- some of these cause diseases
- we then call these pathogens
- bacteria & viruses
- bacteria can cause
diseases by
releasing toxins
that destroy cells
- viruses cause diseases by getting into your cells
- and reproducing
- these
copies
then
burst
out
the
cell
attacking
other
cells
- Dr Semmelweis theory
- child bed
fever was
very
common on
his ward
- the unknown material was being passed from the corpse to the pregnant women
- so he asked every one to wash there hands
- cbf went down
- white blood cells
- help us fight off diseases
- they do 3 things
- injest the bacteria (eat)
- lets out anti toxins
- make anti bodies
- chapter 2
- sensing our suronding
- the nervous system
- stimulus is
changes in the
surrounding
that you can
respond to
- stimulus
- light sound heat
- receptor cells allow us to detect the stimulus
- eyes nose skin ears mouth or tongue
- reflexes are fast and do not involve the brain
- when a light is shone in your eyes your pupuls get smaller
this is an example of a reflex
- reflexes also happen to prevent us from harm
- a closer look at areflex
- the menstral cycle
- the whole process usally last for around about 28 days
- 5 days of bleeding
- fhs is released to start creating a new egg
- on the other 22 you are at a risk of getting pregnant