Name_______________________________________________ Period________Date_____________
Chapter 2.2 Test Review: Cell Membrane & Cell Transport
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.
Label the phospholipids and color the heads red and the tails blue.
List the five main functions of the cell or plasma membrane.
1. ________________________________
2. ________________________________
3. ________________________________
4. ________________________________
5. ________________________________
Match the cell membrane structure or its function with the correct letter from the cell
membrane diagram.
_____
_____
_____
_____
_____
_____
_____
_____
_____
Phospholipid bilayer
Integral protein
Fatty acid tails
Peripheral protein
Phosphate heads
Attracts water
Makes the bilayer
Repels water
Helps transport materials across
the cell membrane
Osmosis and Tonicity
Define osmosis: _______________________________________________________________
Which direction does water move across membranes? ________________________________
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. Label the cell in
an isotonic environment light blue, the hypotonic environment yellow, and the hypertonic
environment light green.
Match the description or picture with the osmotic condition.
A. Isotonic
B. Hypertonic
C. Hypotonic
_____
_____
_____
_____
_____
_____
_____
_____
_____
Solution with a lower solute concentration
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
Solution with a high water concentration
Label the tonicity for each solution (isotonic, hypotonic, hypertonic).
____________
____________
2
____________
What are the 3 types of solutions involved in solute concentration with cells?
1)
________________________________ “cell swelling”
2)
________________________________“cell shrinking”
3)
________________________________“cell homeostasis”
What are the 3 types of solutions involved in solute concentration with cells?
1)
________________________________ “cell eating”
2)
________________________________“cell drinking”
3)
________________________________“Na/K pump”
In which beaker is the concentration the solutes higher, A or B?
A
B
Fill in the chart below to show the differences between active and passive transport.
Active
1. Molecules move across the plasma membrane
2. Molecules move from lesser concentrations to greater concentrations
3. Does not require energy
4. Facilitated diffusion
5. Analogy- rowing a boat down stream
6. Analogy- pushing a boulder up a hill
7. Na-K pump
3
Passive
Semi-permeable membrane
83%
12%
5%
Water
Glucose
Fructose
65%
20%
5%
Water
Glucose
Fructose
a. Will the fructose move?
b. Will the glucose move?
c. Which way will the water move?
d. What will happen to the height of the water in each side of the U tube over time?
How does temperature affect the rate of diffusion?
Cold: _____________________________
Hot: ______________________________
Room Temperature: _______________________
Draw and label the pH scale:
Review the types of cells, cell organelles, cell structure & functions.
Structure/Function
Cell Organelle
Stores genetic material within the cell; Organelle that manages or controls
all the cell functions in a eukaryotic cell
Site of photosynthesis; Contains chlorophyll, a green pigment that traps
energy from sunlight and gives plants their green color
Site of protein synthesis; Small bumps located on portions of the rough
endoplasmic reticulum
4
Jelly-like substance in the cell
Provides energy for cell: site for cellular respiration; Produces a usable
form of energy for the cell
Digests excess or worn-out cell parts, food particles and invading viruses
or bacteria
Produces lipids
Firm, protective structure that gives the cell its shape in plants, fungi, most
bacteria and some protests; Provides support for the cell (plant cell only)
Packages proteins for transport out of the cell
Surrounding the cell; Composed of a phospholipid bilayer
Place the following descriptions in the correct locations on the Venn Diagram. Each description
will only be used once.




Has organelles
Plants, animals, protozoa,
and fungi
No organelles
Can be unicellular or
multicellular
PROKARYOTES






Cells have cytoplasm
DNA randomly in cell
Has a cell membrane
Cells have a nucleus
Means “before nucleus”
Means “true nucleus”
BOTH
5






No nucleus
DNA in nucleus
Smaller cells
ONLY unicellular (bacteria)
All life came from these
Cells contain DNA
EUKARYOTES