, 2 1 5 BIOLOGICAL
. .
MEMBRANES
Roles of membranes
They separate the contents
·
of the cell from their
environment
the
↳
they also separate
organelles from each other
+
cytosol = compartmentalisation
[that allows the specific
This
g
Metabolism conditions required for
includes
& reactions (e g
car . .
chemical gradients) to
be maintained I
Proteins
·
have to be wi particular positions for
chemical reactions to take place
·
they act as barriers -
controlling what comes
wito , out of the cell
↳
they'reJ
partially permeable so only
certai molecules can pass through
·
invowed in the secretion of hormones/
druicals that signal other alls
They contain all receptors that
hormones/
·
# memicals can buid to Cels
alowning ,
to communicate with each other
I Cell signalling
. .
MEMBRANES
Roles of membranes
They separate the contents
·
of the cell from their
environment
the
↳
they also separate
organelles from each other
+
cytosol = compartmentalisation
[that allows the specific
This
g
Metabolism conditions required for
includes
& reactions (e g
car . .
chemical gradients) to
be maintained I
Proteins
·
have to be wi particular positions for
chemical reactions to take place
·
they act as barriers -
controlling what comes
wito , out of the cell
↳
they'reJ
partially permeable so only
certai molecules can pass through
·
invowed in the secretion of hormones/
druicals that signal other alls
They contain all receptors that
hormones/
·
# memicals can buid to Cels
alowning ,
to communicate with each other
I Cell signalling
