By: Jackson Scully
Doctor Osmosis:
Controller of all of the
transporter proteins
 Osmosis is the diffusion
of water molecules
through a selectively
permeable membrane from
an area of greater
concentration of water
to an area of lesser
concentration of water.
 The diffusion of water
molecules is a passive
transport method because
it does not call for the
cell to use energy.
 If cells are placed in
solutions that are very
diverse in concentration
from that of the cell,
the cells may be injured
and even wither or
rupture (lyse).
 Another process of
active transport happens
when molecules are too
large to pass through a
cell membrane even with
the aid of transport
proteins. These
molecules require the
use of vesicles to help
them through the
membrane.
 If the large molecule is
passing into the cell,
the process is called
endocytosis.
 If the large molecule is
passing out of the cell,
the process is called
exocytosis.
 Entry of water in to the
roots from the soil
takes place by this
process.
 Cell to cell diffusion
of water is controlled
through this process.
 Young cells require
stiff condition for
their growth which is
fulfilled by osmosis.
 Turgidity of cells is
maintained by the
process of osmosis
Significance
of Osmosis
 helps give the cell
access to the larger
particles outside the
cell.
 helps transport
unnecessary large
particles out of the
cell to make room for
different particles.
 There are many
differences between
Osmosis and
Endocytosis/Exocytosis.
One is that Osmosis is a
passive transport and
Endocytosis/Exocytosis is
an active transport.
 The way that the
materials are transported
are different. Osmosis
have transport proteins
which help to carry the
particles through the
membrane while
Endocytosis/Exocytosis
has vesicles that are
like boats and they
transport the large
particles that cant be
transported by transport
proteins.
 Both Osmosis and
Endocytosis/Exocytosis
are used to transport
proteins.