Cellular transport is the process of moving materials into and out of cells. There are three main types of cellular transport: passive transport, active transport, and facilitated diffusion. Passive transport involves the movement of molecules across the cell membrane through diffusion or osmosis without using energy, allowing molecules to move from areas of higher to lower concentration until equilibrium is reached.

1. Mr. Miller

2.  Cellular transport is the process of moving
materials into and out of the cell.
 Materials such as water, sugar(glucose),
oxygen, and carbon dioxide into and out of
cells because they are needed to carry out
important reactions in the cell. These reactions
are responsible for creating food within cells
and producing energy.

3.  Cellular transport can be categorized into one
of three groups:
 Passive Transport
 Active Transport

4.  Passive transport is the movement of materials
across the cell membrane with out the use of
energy.
When passive transport occurs molecules
are transported across the cell by way of a
process known as diffusion.

5.  Diffusion is the
movement of molecules
from an area where
there is more of them to
an area where there is
less of them.
 These molecules
continue to move until
equilibrium is reached.

6.  Equilibrium
occurs when
molecules of
one substance
are evenly
spread through
out another
substance

7.  Osmosis is the diffusion of water.
 This type of diffusion has a special name
because water is vital to life of the cell

8.  Facilitated diffusion is the final
type of passive transport we
will learn about today.
 Facilitated diffusion is a process
which occurs with substances
like sugar (glucose) that are too
large to pass through the cell
membrane by diffusion.
 These substances enter and
leave the cell through transport
proteins which are like
doorways into the cell for
certain substances.