Name_____________________
Date____________ Block____
The Cell Membrane
Test Review
Cell Membrane
1. List the functions of the cell membrane:



Structure of the Cell Membrane
2. The cell membrane is made of a ____________________ ____________________ and
has ________________ _______________ embedded within the membrane.
3. The membrane is said to be _______________ __________________ meaning that
some substances can pass across them and some cannot.
4. The cell membrane has channels or pumps that help move materials from one side of the
cell to the other. What are these channels or pumps made of?
____________________________
5. What is cytoplasm? What molecule is cytoplasm mostly made of?
Movement of Materials Across the Membrane
6. _____________________ is the process by which molecules move from an area of high
concentration to an area of _______________ concentration.
7. When the concentration of the solute inside the cell is the same as the concentration
outside the cell, the cell and its environment has reached
_____________________________.
8. What is a concentration gradient?
9. _________________ occurs because molecules are constantly moving and colliding with
each other.
10.True or False? When equilibrium is reached, molecules stop moving. _____________
11._____________________________ is the process by which WATER moves from an area
of high concentration to an area of low concentration.
12.What type(s) of particle transport do not require energy? _______________________,
___________________, and __________________ ___________________.
13.In active transport, molecules move from an area of __________ concentration to an area
of _________ concentration. Does this type of particle transport require energy?
_________
14.What is facilitated diffusion?
15.Where does facilitated diffusion occur in the cell membrane? ______________________
16.What is endocytosis?
17.What molecules are taken into the cell during pinocytosis?
18.What molecules are taken into the cell during phagocytosis?
19.What is exocytosis?
Types of solutions
20.The concentration of a solution is the ___________ of solute in a given volume of
solution, or mass/volume.
21. Define the following and draw a picture to illustrate the direction of molecule movement
into and out of a cell placed in each type of solution.
Isotonic –
Hypertonic –
Hypotonic –
Use the definitions and the pictures you drew to answer the following questions.
22.What will happen to an animal cell that is placed in a solution of fresh water? Why does
this happen?
23.What will happen to an animal cell that is placed in a solution of salt water? Why does
this happen?
24.In the lab using the elodea leaf, where did the chloroplasts move when they were bathed
in a hypertonic salt solution?
25.What type of solution is distilled water?
26.In the lab using the elodea leaf, where did the chloroplasts move when they were bathed
in distilled water?
27.What type of pressure caused the chloroplasts to move against the plant cell wall?
28.What happens in the cells of a plant if it is not watered?
Cell Specialization
29. What is cell specialization?
30. List the four types of tissue in the body. What are the functions of these tissues?
a.
b.
c.
d.
31. How does the structure of a red blood cell help it to do its job?
32. What type of tissue makes up skin and lines your internal organs?
33. What type of tissue allows you to run in a race?
34. What type of tissue provides support for the body? Examples of this type of tissue are
tendons, bones, ligaments, and blood.