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biology b1! 1



BIOLOGY-
B1
Keeping
Healthy
· Proteins
-build
new
*ssues,
amino
acids,
growth
and
repair
· Carbohydrates
-
energy
· Fats
-
stored
energy
· Water-
chemical
reac*ons
· Fibre-
help
prevent
cons*pa*on
· Vitamins
and
minerals
-
general
health

METABOLISM-
rate
at
which
reac*ons
in
the
body…

Page 2

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biology b1! 2



MMR
Vaccine
&
Ignaz
Semmelweis
· some
scien*sts
think
it
was
linked
to
au*sm,
people
didn't
take
the
vaccine
Ignaz
Semmelweis
- no*ced
`childbed
fever'
-->
killed
the
people
the
people
who
suffered
NoAced:
when
midwifes
delivered
the
babies,
low
number
of
deaths
when
medical
students
delivered…

Page 3

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biology b1! 3

Control
in
the
Human
Body
- temperature
-->
needs
to
be
t
37
degrees
for
enzymes
to
work
at
- water
-->
70%
of
body
is
water,
vital
for
chemical
reac*ons
- ions
--->
need
correct
ion
balance
so
cells
can
work,
don't
become
shrivelled
up
or…

Page 4

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biology b1! 4

Developing
New
Drugs
for
Medicine
Drugs
-->
affect
body
chemistry,
used
for
medical,
recrea*onal
or
for
performance

enhancing
purposes
can
be
legal
or
illegal

Medical
drugs
--->
New
Drugs,
tested
in
lab
1.
Toxicity
Trials
-->
drugs
tested
on
cells,
*ssues
&
animals
to
see
if
they're…

Page 5

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biology b1! 5

Animals
Cold
temperatures:
- thick
fur,
traps
air
keeps
warm
- thick
layer
of
fat,
good
insulator
- white
colour,
for
camouflage
keep
away
from

Large
surface
area
to
volume
raFo
-->
LOSE
HEAT
Cactus:
dry
condi*ons,
leaves(low
surface
area
so
doesn't
lose
water),
thick
stem(store

water),…

Page 6

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biology b1! 6

Tissue
Culture
1. Take
small
group
of
cells
from
leaf
or
stem
or
root
2. put
the
ball
of
cells
in
nutrient
agar
jelly
(contains
vitamins,
sugars
&
hormones)
3. allow
to
grow,
the
offspring
will
be
clones
of
the
original
plant,
the
agar
jelly
needs
to…

Page 7

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biology b1! 7

Darwin
Vs
Lamarck
Darwin Lamarck

Individual in a species show variation in Individuals in a species can change their
features features over their lifetime

Advantageous features help individuals to These changes made by the living
live longer & reproduce individuals are passed onto their
offspring

Advantageous features…

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