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Transcript
Cell Transport
Essential Questions
Differentiate passive and active
transport.
What is the difference between diffusion
and osmosis.
Passive Transport
Homeostasis An organism tries to maintain
I. ___________:
regulating
a stable internal environment by ________
enters and leaves
what ______
_____ the cell. This is the
membrane It is
function of the cell
_____________.
semipermeable
or selectively permeable
___________________________________.
Food
Oxygen
Water
Cell
Wastes
CO2
Excess water
II. The cell membrane is a double layer
lipid bilayer
called a __________.
Passive Transport
III. ______________
A. Cell use ___________.
NO ENERGY (Like moving
_______)
downhill
B. Molecules move from an area of ____
High
concentration to an area of Low
___
concentration
High
Low
C. Examples
Diffusion The movement of molecules
1. ________:
_________
high concentration to an area of
from an area of _____
low concentration.
___
water though a
2. Osmosis
________: The movement of _____
selectively permeable membrane from an area of
____________________
high concentration to an area of low
____
___ concentration
3. Facilitated
________________
diffusion uses transport proteins to move
other ions and small molecules across the plasma
membrane. Substances move through a transport
protein called ______________
channel protein that opens and closes
to allow substances to diffuse through the membrane
A cell is
placed in a
_________
Hypertonic
solution
(solution with
more solute than
the cell
Water
salt (solutedissolved
substance)
A cell is
placed in a
_________
Hypotonic
solution
(solution with
less solute
than the cell)
Water
salt (solute)
Water
Salt (solute)
water
Cell
shrinks
A cell is
placed in an
_______
Isotonic
solution
(solution with
equal solute
concentration
with that of the cell)
water
Water moves in and out of
the cell at an equal rate. -DYNAMIC EQUILIBRIUM
water
Cell swells
and bursts
Active Transport
Active Transport
IV. _______________
energy =___.
ATP (Like moving
a. A cell uses ______
uphill
_____)
low
b. Molecules move from an area of _____
high
concentration to an area of ____
concentration.
low
equilibrium
high ( Do not reach ___________)
C. Examples
Endocytosis (_____):
enter The cell takes in
1. __________
__
material by forming a pouch (________)
vacuole
around the substance.
Exocytosis (___):
exit A cell moves a
2. _________
substance to the _______
outside of a cell using
a vacuole.