1. Unit 4 : Cell Membrane & Transport Study Guide
Name: Class:
Unit 4 : Cell Membrane & Transport Study Guide
Review Tips:
Complete this sheet. Quiz yourself from this handout.
Review ALL vocabulary
Review ALL of the Notes
Review ALL class handouts and worksheets.
________________________________________________
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_____________________________________________________________________________
In passive transport, molecules move from areas of _______________ concentration to areas of ______________ concentration.
In active transport, molecules move from areas of ________________ concentration to areas of ______________ concentration.
______________________________________________________________________________
Diffusion continues until __________________ when molecules still _______________ but stay ______________________.
In facilitated diffusion, molecules move from areas of _____________ concentration to areas of ________________ concentration.
In osmosis, _____________ moves from areas of _____________ concentration of _________________ to areas of _____________________ concentration of _______________.
________________________________________________________________________
A solution that has a lower concentration of solutes and a higher concentration of water than inside the cell is _________________.
A solution that has a higher concentration of solutes and a lower concentration of water than inside the cell is _________________.
________________

2. What process does this diagram illustrate?
A solution that has an equal concentration of solutes outside and inside the cell is
_________________.
28) ___________________________________________________________________________
29) ___________________________________________________________________________
30) ___________________________________________________________________________
31) ___________________________________________________________________________
32) ___________________________________________________________________________
33) ____________________________________________________________________________
34) ____________________________________________________________________________
35) ____________________________________________________________________________
36) A cell has 20% salt and 80% water in a solution that has 10% salt and 90% water.
What is the tonicity of solution is the cell in? (hypertonic, hypotonic, or isotonic)
Where will water move?__________________________________________
What will happen to the cell?______________________________________
37) A cell has 20% salt and 80% water in a solution that has 30% salt and 70% water.
38) A cell has 20% salt and 80% water in a solution that has 20% salt and 80% water.
What is the tonicity of the solution the cell is in? (hypertonic, hypotonic, or isotonic)
39) ____________________________________________________________________________
40) ____________________________________________________________________________
Protein pumps change _________________ and require ______________________.
42) Protein pumps move molecules from areas of _________________ concentration to areas of _______________concentration.
43) ____________________________________________________________________________
44) ____________________________________________________________________________
45) _____________________________________________________________________________
46) _____________________________________________________________________________
47) _____________________________________________________________________________
What process does this diagram illustrate?
Be able to identify the type of solution each cell is in, based on its appearance.

3. Unit 4 : Cell Membrane & Transport Study Guide
Name: Class:
Unit 4 : Cell Membrane & Transport Study Guide
Review Tips:
Leave this sheet blank. Put your answers on a separate page so you can quiz yourself from this handout.
Review ALL vocabulary
Review ALL of the Notes
Review ALL class handouts and worksheets.
What are two functions of the cell membrane?
What is the cell membrane primarily made of?
Why is the cell membrane arranged in a bilayer?
How does the cell membrane help maintain homeostasis?
Why is the fluid environment of the cell and its surroundings important to its function?
What does it mean that the membrane is selectively permeable?
What are the two types of transport?
What are the two main differences between the two types of transport?
What are the three types of passive transport?
What are the three types of active transport?
In which type of transport do molecules move randomly?
In which type of transport do molecules move actively?
In passive transport, molecules move from areas of ______ concentration to areas of ________ concentration.
In active transport, molecules move from areas of ______ concentration to areas of ________ concentration.
What is diffusion?
Diffusion continues until __________________ when molecules still __________ but stay ________________.
What is facilitation diffusion?
How do transport proteins work?
What types of molecules would typically be transported by facilitated diffusion? Give an example of such a molecule.
In facilitated diffusion, molecules move from areas of ______ concentration to areas of ________ concentration.
What is osmosis?
In osmosis, _____________ moves from areas of ______ concentration of __________ to areas of ________ concentration of __________.
Why can a cell not control the movement of water?
Define solute and solvent.
A solution that has a lower concentration of solutes and a higher concentration of water than inside the cell is _________________.
A solution that has a higher concentration of solutes and a lower concentration of water than inside the cell is _________________.
Be able to identify this structure and label the polar/nonpolar parts:

4. What process does this diagram illustrate?
A solution that has an equal concentration of solutes outside and inside the cell is
_________________.
28) What would happen to a cell that is placed in a hypotonic solution? What is that called?
29) What would happen to a cell that is placed in a hypertonic solution?
30) What happens when a cell is placed in an isotonic solution? What is that called?
31) What prevents bacteria and plant cells from over-expanding?
32) What is turgor pressure?
33) How do protists control water in their cells?
34) How do fish control the concentration of salt in their cells?
35) What organs do humans use to remove excess salts and water?
36) A cell has 20% salt and 80% water in a solution that has 10% salt and 90% water.
What is the tonicity of solution is the cell in? (hypertonic, hypotonic, or isotonic)
Where will water move?
What will happen to the cell?
37) A cell has 20% salt and 80% water in a solution that has 30% salt and 70% water.
38) A cell has 20% salt and 80% water in a solution that has 20% salt and 80% water.
What is the tonicity of the solution the cell is in? (hypertonic, hypotonic, or isotonic)
39) What are protein pumps?
40) Give an example of a protein pump.
Protein pumps change _________ and require __________.
42) Protein pumps move molecules from areas of ______ concentration to areas of ________ concentration.
43) What is endocytosis?
44) Describe the process cells use to “eat”.
45) What is exocytosis?
46) What types of materials are commonly expelled by exocytosis?
47) Why does active transport require energy, and passive transport doesn’t?
Be able to identify the type of solution each cell is in, based on its appearance.
What process does this diagram illustrate?