Cell Membrane and Transport
Structure (con’t)
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Pg. 2
Proteins are scattered throughout the cell membrane, and
there are ________________ types:
1. _______________________: proteins that only attach to one side of
the membrane and do not go all the way across
2. _______________________: proteins that span from one side of
the membrane to the other
Fluid Mosaic Model
The Fluid Mosaic Model states that the cell membrane is like an
ocean of ______________________________________ and ____________________,
they are able to ________________________________________________________.
Function and Purpose
1) Controls what goes in/out of the cell
(it is __________permeable or ____________________________ permeable)
2) Also __________________________________________ to keep the internal
metabolism/reactions _____________________________ from the outside
Transportation
The ________________________ proteins in the cell membrane transport
things into and out of the cell in two different ways based on the
____________________________________________________________________________.
Structure
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Cell membrane is made of _____________________________________
Has 2 layers so it is referred to as a phospholipid ________________
Phospholipids have a ____________/hydro________________ head and
________________________/ hydro_____________________ tail.
This causes the double membrane to have a hydrophobic
environment on the_______________________ and hydrophilic
surfaces on both sides ________________________
Molecules will naturally travel from where there is a ________________
amount to where there is a _________________ amount.
There are 2 types of Transport, ___________________ & _________________.
Passive Transport
Pg. 1
Molecules move from _________________________________________________to
__________________________________________ on their own with No Energy.
Passive Transport (con’t)
Since molecules naturally go from where there is more to where
there is less, this ______________________________________________________.
3. _____________________________ – __________________________________
across the cell membrane, very important to
____________________________________________________________________.
There are ___________ Types of Passive Transport.
1. __________________________ – molecules travel _______________ the
concentration gradient ________________________________________
(like O2 and CO2)
The _________________________________________ can be affected by:
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Temperature
Agitation (mixing/stirring)
Particle Size
Concentration Difference
Pressure
The water moves to_______________________ the side with a higher
concentration of particles.
2. ___________________________________ – molecules go ___________the
concentration gradient using __________________________________
All passive transport tries to achieve _____________________________.
(when the ____________________________________________ ratio is equal
on both sides)
This is to preserve ________________________________________________!
____________________________ – tunnels that molecules can pass through
____________________________ – proteins open and close to transport
molecules
1 molecule
per ounce
Pg. 3
3 molecules
per ounce
2 molecules
per ounce
2 molecules
per ounce
Pg. 4
Pg. 5
Active Transport
Molecules move from ___________________________________________ to
_____________________________________ with help and MUST use Energy
ATP
Active Transport (con’t)
2. ________________________________ - Bulk Transport using vesicles.
A. ________________________ – Cell takes in molecules by
making a membrane bubble around it
I) Phagocytosis – cell ________________________
II) Pinocytosis – cell __________________________
ATP
Since molecules naturally go from where there is more to where
there is less, forcing them to do the opposite ______________________.
(_______________)
There are ___________ Types of Active Transport.
1. ____________________________ – Protein that uses energy (ATP)
to transport molecules _________________ their concentration
gradient.
B. _________________________ – Cell gets rid of molecules by fusing a
membrane bubble to the cell membrane
Example: Na+/K+ Pump (_______________________________________ Pump)
Pg. 6