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 TAILS

ENERGY PHOSPHATE WITH FATTY ACIDS PLASMA FREELY

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 ATP TRANSPORT AGAINST/UP

AGAINST/UP ATP SHAPE