AP Cell membrane and Transport Webquest

University: Capitol Technology University

Course: Spanish grammatic (SPAGRC)

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Students shared 131 documents in this course

Cell Membrane & Transport

Webquest

Site 1: Cell Membrane http://www.susanahalpine.com/anim/Life/memb.htm

Play the animation to see an overview of the cell membrane. Step through

the animation a SECOND time. As you do, complete question 1.

1. Draw the cell membrane and label the following structures:

(+, -, phospholipids, hydrophilic heads, hydrophobic tails,

peripheral proteins, integral proteins, cholesterol)

Site 2a: Phospholipids http://learn.genetics.utah.edu/content/cells/membranes/

At this point you have discovered that one of the major components of the cell membrane are

phospholipids. Read “Membranes Form Spontaneously” and answer the questions below.

2. Draw a phospholipid. Label the hydrophilic head and hydrophobic lipid tail.

3. What happens to phospholipid when they are placed in water?

______________________________________________________________

4. What is the name of the structure? _________________________________

Passive Transport: https://www.sciencedirect.com/topics/biochemistry-genetics-and-

molecular-biology/passive-transport

5. Passive transport is the movement of molecules from an area of ______________ concentration to an area of

__________ concentration which ___________ (does or does not) require energy.

Site 2b: Cholesterol https://www.khanacademy.org/test-prep/mcat/cells/cell-membrane-overview/a/fluid-mosaic-model-

cell-membranes-article

1. How does temperature affect the cell membrane structure? How does cholesterol maintain fluidity?

Site 3: Diffusion

http://highered.mheducation.com/sites/0072495855/student_view0/chapter2/animation__how_diffusion_

works.html

If you have them, plug in your headphones. Otherwise, simply read the text and watch the animation.

1. In terms of molecules, explain what happens to a sugar cube when it is placed into a beaker of water.

___________________________________________________________________________________________

2. Define diffusion. ______________________________________________________________________________

3. Using the arrow seen below, illustrate the

diffusion of molecules from high

concentration to low concentration.

4. What can affect the rate of diffusion?

___________________________________________________________________________________________

5. Predict: what would happen if you drop the sugar cube into a beaker of hot water vs. a beaker of cold water.

___________________________________________________________________________________________

___________________________________________________________________________________________

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