The
cell
membrane
is
the
cell
____________________
that
____________________
what
goes
into
and
out
of
a
cell
.
In
an
____________________
cell
,
the
cell
membrane
is
the
____________________
edge
and
surrounds
the
entire
cell
.
In
a
____________________
cell
,
the
cell
membrane
is
located
just
____________________
the
cell
wall
.
____________________
everything
is
able
to
go
through
the
cell
membrane
:
some
things
are
____________________
through
while
others
are
kept
____________________
.
This
characteristic
is
known
as
____________________
____________________
and
it
helps
the
cell
keep
out
chemicals
that
might
____________________
the
cell
.
The
materials
that
are
allowed
to
____________________
the
cell
can
go
through
in
one
of
two
ways
.
____________________
molecules
can
just
float
through
the
cell
membrane
without
any
help
or
effort
.
This
process
is
called
____________________
transport
.
The
small
molecules
just
____________________
right
through
the
membrane
.
____________________
molecules
need
help
to
get
through
the
cell
membrane
.
The
cell
membrane
uses
____________________
to
pull
and
push
the
large
molecules
through
.
This
process
is
called
____________________
transport
.
Passive
transport
is
sometimes
called
____________________
.
When
there
is
a
____________________
amount
of
a
material
outside
of
the
cell
,
and
a
____________________
amount
inside
,
the
molecules
will
move
from
where
there
is
a
lot
to
where
there
are
few
.
For
example
,
when
there
is
a
lot
of
water
outside
of
the
cell
,
the
water
molecules
will
move
to
the
____________________
of
the
cell
.
