Name:______________________________________________________Date:_________________Period:________
CELL MEMBRANE COLORING WORKSHEET
Composition of the Cell Membrane and Functions (word bank at the bottom of the page if you need it)
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 __________________________transport because it does not require ___________________and the water or molecules are moving ________________the concentration gradient.
SKETCH AND LABEL a phospholipid below. Color the heads RED and the tails BLUE.
PHOSPHOLIPID:
Another type of lipid in the cell membrane is ______________________that makes the membrane more rigid. Embedded in the phospholipid bilayer are ____________________that also aid in diffusion and in cell recognition.
List 4 functions of the cell or plasma membrane: a.__________________________________________________________________________________________ b.__________________________________________________________________________________________ c.___________________________________________________________________________________________ d.___________________________________________________________________________________________
BILAYER HEAD SMALL CELLULOSE PASSIVE
PHOSPHATE WITH FATTY ACIDS PLASMA
TAILS
FREELY ENERGY
PROTEINS

Correctly color code and identify the name for each part of the cell membrane.
Letter Name/Color
______ Transport protein (red)
______
______
Fatty acid tails (orange)
Phosphate heads (yellow)
_____
_____
_____
Match the cell membrane structure or its function with the correct letter from the cell membrane diagram.
LETTER
_____
_____
_____
STRUCTURE/FUNCTION
Attracts water
Helps maintain flexibility of membrane
Involved in cell-to-cell recognition
Repels water
Make up the bilayer
Help transport certain materials across the cell membrane

OSMOSIS
Define osmosis:___________________________________________________________________________________
In which direction does water move across membranes, up or down the concentration gradient?_________________
Define these 3 terms: a.
Isotonic-__________________________________________________________________________________ b.
Hypertonic-_______________________________________________________________________________ c.
Hypotonic-________________________________________________________________________________
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.
95 % WATER 98% WATER 100% WATER
Match the description with the osmotic condition:
A.
Isotonic
B.
Hypertonic
C.
Hypotonic
1.
___________solution with a lower solute concentration
2.
___________solution in which the solute concentration is the same
3.
___________condition plant cells require
4.
___________condition animals cells require
5.
___________red blood cell bursts (cytolysis)
6.
___________plant cell loses turgor pressure (plasmolysis)
7.
___________solution with a higher solute concentration
8.
___________solution with a high water concentration

Label the tonicity for each solution (isotonic, hypotonic, or hypertonic):
______________________ _______________________ _______________________
______________________ _______________________ _______________________

TRANSPORT REQUIRING ENERGY (word bank at the bottom of the page if you need it)
What type of transport is represented by the following picture?___________________________________
What energy is being used?___________________________
In which direction (concentration gradient), is the movement occurring?_____________________________________
COLOR the internal environment of the cell yellow. COLOR AND LABEL the transport proteins red and the substance being moved blue.
One type of active transport is called the sodium-potassium pump which helps muscle cells contract. This pump uses _________________to move ions__________________________the concentration gradient. The protein that is used to pump the ions through is called a _____________________protein and it changes its __________________ to move the ions across the cell membrane.
LABEL AND COLOR the transport proteins red and the ions green.
ACTIVE
AGAINST/UP ATP
ATP
SHAPE
TRANSPORT AGAINST/UP