Download Cell Membrane and Passive Transport

NAME________________________________ DATE_________ PERIOD_________
Cell Membrane and Passive Transport

Composition of the Cell Membrane & Functions Use the word bank to complete
the following paragraph.
Passive transport
Small
sideways
head
plasma
bilayer
fatty acids
tails
phosphate
energy
with
The cell membrane is also called the _______________ membrane and is made of a
phospholipid _____________. The phospholipids have a hydrophilic (water attracting)
__________ and two hydrophobic (water repelling) ____________. The head of a
phospholipid is made of an alcohol and __________ group, while the tails are chains of
____________. Phospholipids can move _______________ and allow water and other
_________ molecules to pass through into or out of the cell. This is known as simple
____________ because it does not require __________ and the water or molecules are
moving __________ the concentration gradient.

Correctly color code and identify the name for each part of the cell membrane.
(page 204)
Letter
_____
_____
_____
Name/Color
Phospholipid bilayer (no
color)
Phosphate heads (yellow)
Membrane protein (red)
Letter
_____
_____
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Name/Color
Carbohydrate chain
(blue)
Fatty acid tails (orange)
Passive Transport (Pages 208-211)
Match the following types of passive transport with their definition.
____ diffusion
____ osmosis
____ facilitated diffusion
A. Diffusion of water through an aquaporin
B. Diffusion of molecules through a protein channel
C. Molecules moving from an area of high concentration to
an area of low concentration
In which direction does water move across membranes, up or down the concentration
gradient? ________________
Use arrows to show the direction of water movement into or out of each cell. Color and
label the cell in an isotonic environment light blue, the hypotonic environment yellow, and
the hypertonic environment
light green.
.
5% NaCl
95% H2O
5% NaCl
95% H2O
95% NaCl
5% H2O
95% NaCl
5% H2O
5% NaCl
95% H2O
5% NaCl
95% H2O
a. Water will flow _____________________ (into the cell, out
of the cell, in both directions).
b. The cell will ______________________ (shrink, burst, stay
the same).
a. Water will flow _____________________ (into the cell, out of
the cell, in both directions).
b. The cell will ______________________ (shrink, burst, stay the
same).
a. Water will flow _____________________ (into the cell, out of
the cell, in both directions).
b. The cell will ______________________ (shrink, burst, stay the
same).
Match the description or picture with the osmotic condition:
A. Isotonic
_____ solution with a lower solute concentration
B. Hypertonic
C. Hypotonic
_____ solution in which the solute concentration is the same
_____ condition plant cells require
_____ condition that animal cells require
_____ red blood cell bursts (cytolysis)
_____ plant cell loses turgor pressure (Plasmolysis)
_____ solution with a higher solute concentration
_____ plant cell with good turgor pressure
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_____ solution with a high water concentration
The Effect of Osmosis on Cells NOTES
Label the tonicity for each solution (isotonic, hypotonic, or hypertonic):
____________
____________
(Cyto- cell & Lysis- burst)
____________
Cytolysis:_______________
_______________________
____________
____________
_______________- Pressure
_ ___________
Plasmolysis:___________
____________________
exerted by osmosis, helps plants
maintain structure and posture
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