Name:
Period:
Ms. Pitt
P a g e |1
Cell Transport Web Quest
Go to my wikisite. Pennsbury homepage  Staff pages west  Pitt  click on wiki link 
Click on Parallel Bio I  Scroll down to today’s date and open this document so you can click
on the links.
CELL MEMBRANE
Website #1: Cell Membrane
 Play the animation to see an overview of the cell membrane.
 Step through the animation a SECOND time. As you do, draw the cell membrane and label ALL of the
parts.
Website #2: Phospholipids
 At this point you have discovered that one of the major components of the cell membrane are
phospholipids.
o Draw a phospholipid in the space on the right.
o Label the hydrophilic and hydrophobic sections.

What happens to phospholipids when they are placed in water? ________________________________
___________________________________________________________________________________
Website #3: Construction of the Cell Membrane
 Click through the animation. As you do, match the following:

1
Allow ions and other polar molecules to pass through the
membrane
A
Glycoprotein (Peripheral)
2
Only found in animal cell membranes
B
Channel (Integral) Protein
3
Span the entire membrane and serve as a receptor for the cell.
C
Pore (Globular) Protein
4
Found on the surface of the membrane, they help identify the cell
D
Fibrous (Integral) Proteins
5
Allow water molecules to pass through the membrane
E
Cholesterol
Name:

Period:
Ms. Pitt
P a g e |2
Complete all 10 questions, while doing so, draw a picture of each part:
Glycoprotein
Channel Protein
Pore Protein
(Aquaporin)
Fibrous Protein
Cholesterol
Answer the following questions referencing your notes, text, or peers.
CELL TRANSPORT
1. Why do molecules move into the cell? ____________________________________________________
2. Why do molecules move out of the cell? ___________________________________________________
3. What is concentration? _________________________________________________________________
4. What is a concentration gradient? ________________________________________________________
5. Draw a concentration gradient in the box below, where the concentration of molecules of the left is
greater than that on the right.
PASSIVE TRANSPORT
Website #4: Passive Transport Review
 Click on passive transport. Then step through the animations.
1. What is passive transport? __________________________________________________________
2. What are the three forms of passive transport?
________________________________ ________________________________ ________________________
3. Why is it important to remember that the cell membrane is fluid (flexible)? ____________________
_________________________________________________________________________________
Name:
Period:
Ms. Pitt
P a g e |3
4. Compare the molecules that can get through the membrane to those that cannot. _______________
_______________________________________________________________________________
5. What is diffusion? ________________________________________________________________
6. Why do we say that diffusion occurs along a concentration gradient? _______________________
_______________________________________________________________________________
7. What four factors does the rate of diffusion depend on? Complete the table (you may need to think
about this a bit it is not ALL included in the animation…)
Factor
Is the following going to speed up or slow down diffusion?
A steeper gradient? (meaning a much GREATER difference
in concentration on either side of the membrane)
A higher temperature?
A charged particle (ion)?
A smaller, nonpolar, lighter molecule?
8. When does diffusion end? ___________________________________________________________
________________________________________________________________________________
9. What is facilitated diffusion? ________________________________________________________
________________________________________________________________________________
10. What happens to the protein as the molecule passes through? _______________________________
_________________________________________________________________________________
11. Why is facilitated diffusion needed? ________________________________________________
12. What is osmosis? _________________________________________________________________
13. What is the difference between a hypertonic and hypotonic solution? ________________________
_________________________________________________________________________________
14. Which way does water move? _______________________________________________________
Name:
Period:
Ms. Pitt
P a g e |4
Website 5: Simple Diffusion
 Play the animation to see an overview of diffusion.
 Step through the animation a SECOND time. As you do, complete the following questions:
1. Molecules are in constant
.
2. What is simple diffusion?__________________________________________________________.
3. Complete the following picture, with an arrow, as shown in the animation:
Area of higher
Concentration
Area of lower
Concentration
4. When does diffusion stop? _______________________________________________________.
Website #6: Osmosis
 Play the animation to see an overview of osmosis:
15. What is osmosis? _________________________________________________________________.
16. What is a hypertonic solution? _______________________________________________________.
17. Play the animation. Draw a picture
of what happens to cells in a
hypertonic solution.
18. What is a hypotonic solution? _____________________________________________________
19. Play the animation. Draw a picture
of what happens to cells in a
hypotonic solution.
20. What is an isotonic solution?
______________________________________________________________________________
21. Play the animation.
Draw a picture of what happens
to cells in an isotonic solution.
Name:
Period:
Ms. Pitt
P a g e |5
Based on what you have read complete the following table using the word bank provided:
Word Bank
(Look up any word you do not know!)
Into the Cell
Out of the Cell
Into and Out of the Cell
Cytolysis (Swells & Pops)
Crenates (Shrinks)
Plasmolysis (Shrinks)
Does water move in or out of
the cell?
How does an animal cell
respond?
Turgor Pressure (Swells)
Stays the Same
Stays the Same
How does a plant cell respond?
Hypertonic
Hypotonic
Isotonic
ACTIVE TRANSPORT
1. What are the two characteristics of active transport? 1) ______________________________________
2) ______________________________________
2. What are examples of active transport? ___________________________________________________
___________________________________________________________________________________
Website #7: Active Transport
 Read the Introduction.
22. What is the difference between active and passive transport? (there are 2 differences)
1. __________________________________________________________________
2. __________________________________________________________________


Click the animation tab (at the top). Then click the step through box. Then click primary active
transport.
Play the animation. Click continue and play as you go to move forward.
23. What is the name of the “pump” (membrane protein) in the picture?
__________________________________
Name:
Period:
Ms. Pitt
P a g e |6
24. What does it move out of the cell? How much of this does it move?
_______________________________________________________________________________
_______________________________________________________________________________
25. What does it move into the cell? How much of this does it move?
_______________________________________________________________________________
_______________________________________________________________________________
26. Why is this considered a pump? _____________________________________________________
_______________________________________________________________________________
 Click on Conclusion at the top and read it.
 Then, click on Quiz and take the quiz: How many did you get correct? ____
Website #8: Endocytosis and Exocytosis
 Play the animation to see an overview of endocytosis and exocytosis.
27. What are the three types of endocytosis? What does each type transport?
Types
What does it transport?
1)
2)
3)
28. What is the difference between endocytosis and exocytosis?