Cell Membrane Coloring Worksheet

NAME______DATE______PERIOD______

Cell Membrane Coloring Worksheet

Composition of the Cell Membrane

The cell membrane is also called the p______membrane. The cell membrane is primarily made of a d______l______of p______molecules which is embedded with a variety of other molecuels. Phospholipid molecules are composed of t______smaller molecules. The head of a phospholipid is made of two molecules: p______and a g______. The two tails are chains of f______a______molecules. The phosphate heads are polar molecules which causes them to be h______which means water attracting. The fatty acids tails are nonpolar molecules are water repelling which means they are h______.

Sketch and Label

Draw a phospholipid bilayer as it would appear surrounding a cell. Color the phosphate heads red and the fatty acid tails blue.

PHOSPHOLIPID BILAYER

Other molecules that are part of the Cell Membrane

Depending on the particular cell, there are other molecules embedded in the phospholipid bilayer. Each molecule has a special job. Cholesterol molecules s______the same membrane and make the membrane more flexible. Some proteins are part of the c______and others h______. Carbohydrates serve as i______t______. This enables cells to d______. Embedded in the phospholipid bilayer are p______that aid in helping molecules move through the cell membrane and help cells recognize each other.

List 4 functions of the cell or plasma membrane:

a. / ______
b. / ______
c. / ______
d. / ______

An important property of the cell membrane is s______

p______. This means ______

______.

Another term that means the same as selectively permeable is

s______. This property enables a cell to maintain

h______even though ______

______. The method that a molecule uses to cross the cell membrane depends on 3 things: its s______, p______,

and c______.

(Refer to page 83 to answer the following questions)

Which types of molecules move easily through membrane? ______

Which molecules must be transported by proteins?______

Which molecules are moved inside vesicles?______

Correctly color code each part of the cell membrane.

Letter / Name/Color / Letter / Name/Color
__A__ / Phospholipid bilayer
(do not color) / __H___ / Peripheral protein (yellow)
__B__ / Integral protein (pink) / __I__ / Cholesterol (orange)
__F__ / Fatty acid tails (blue) / __C__ / Glycoprotein (green)
__G__ / Phosphate heads (red) / __E___ / Carbohydrate(purple)

Match the cell membrane structure or its function with the correct letter from the cell membrane diagram.

Letter / Structure/Function
/ Letter / Structure/Function
_____ / Attracts water / _____ / Repels water
_____ / Helps maintain flexibility of membrane / _____ / Make up the bilayer
_____ / Involved in cell-to-cell recognition / _____ / Helps transport some substances across the cell membrane

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