Biology Activity: Transport Webquest
NAME______________________________
Find the following website listed below. This document is linked on my webpage under Cell Transport WebQuest.
http://www.wisc-online.com/objects/ViewObject.aspx?ID=ap1101
1.
The cell membrane is mainly composed of
a.
b.
2.
List and describe three examples of globular-shaped proteins:
a.
b.
c.
3.
What is the function of cholesterol in the membrane?
4.
Why is cholesterol not present in plant cells?
Find the following website listed below.
http://programs.northlandcollege.edu/biology/Biology1111/animations/transport1.html
Select “Passive Transport”
1. Define passive transport in your own words.
2.
What are three types of passive transport?
Click “Next”
1. What are two things that make up the plasma membrane?
a.
b.
2.
Diagram a phospholipid. Make sure to label the following: hydrophobic, phosphate, nonpolar, lipid, hydrophilic, polar.
3.
Describe the movement of the plasma membrane. Explain why it moves this way.
If you miss something, click “Back” If not, click “Next”
1. Explain diffusion in your own words.
2.
Explain concentration gradient in your own words.
3.
List 4 “things” that the rate of diffusion depends on:
a.
b.
c.
d.
4.
Diffusion ends when ___________________________ has been met.
If you miss something, click “Back”. If not, click “Next”
1. Explain facilitated diffusion in your own words.
2.
Facilitated diffusion _____________________ require ATP; therefore it is an example of passive transport.
3.
Describe the movement of the carrier proteins.
If you miss something, click “Back”. If not, click “Next”
1. Explain osmosis in your own words.
2.
In the animation of the plasma membrane, explain if it is showing a hypertonic solution or hypotonic solution. (Look at
the movement of water) Explain what will occur and why.
3.
(Not in animation) Explain a hypertonic solution. Make sure to include the movement of water, what is happening to
the cell, and the concentrations inside and out of the cell.
4.
(Not in animation) Explain a hypotonic solution. Make sure to include the movement of water, what is happening to the
cell, and the concentrations inside and out of the cell.
If you miss something, click “Back”. If not, click “Next”
1. Define active transport in your own words.
2.
Why is active transport necessary?
If you miss something, click “Back”. If not, click “Next”
1. View the “Ion pump Animation”. Describe the movement of the H+ in terms of the concentration gradient. (HINT: Are
they moving from a high to low concentration or a low to high concentration)
Find the following website listed below.
Go to: http://www.wiley.com/legacy/college/boyer/0470003790/animations/membrane_transport/membrane_transport.htm
1.
State two reasons why cell transport is so important.
Click the arrow at the bottom of the webpage that says: “Continue”. You will be on a page that entitled: MEMBRANES.
2. What two macromolecules are the main components of the cell membrane?
3.
What are the two main characteristics that determine whether a molecule can pass through the cell membrane or not?
Click the “Continue” arrow. You will be on a page entitled: DIFFUSION/OSMOSIS.
4. Describe the movement of medium solutes across the cell membrane in terms of their concentration.
5.
If the high concentration of solutes is outside the cell and the low concentration of solutes is inside the cell, in what
direction will the solutes tend to flow?
6.
Do some molecules still go the opposite way (click the rewind button so you can observe carefully.) Explain.
Click the “Continue”
7. List the components of the balloon experiment.
8.
What is the “aim” of osmosis?
Click the “Continue” arrow and observe experiment.
9. What happened to Balloon #1? What happened to Balloon #2?
10. Why are the two balloons different sizes?
11. What moves across the membrane, sugar or water? (HINT: Observe the animation. You might need to rewind it a few
times to see what is occurring.)
12. Explain WHY for the movement described in #11.
Click “Continue”. You will be on a page titled PASSIVE TRANSPORT.
13. What is the purpose of membrane transporters?
14. What are the two general types of transporters?
Click “Continue”
15. Explain the movement/function of Glucose Permease, a passive transporter.
16. Explain how Glucose Permease serves as an example of passive transport.
Click “Continue”
17. Back to the balloons. Observe the animation when both water and sugar are passing through the lipid bilayer. Explain
what happens in terms of the movement of sugar and water. You may need to rewind and observe several times.
Click “Continue”
18. Glucose permease is included in membrane. Select one of the options on how the model will behave and write it below.
19. Explain what happened.