Name:
Transport Across A Cell Membrane
I. Cell Membrane
1. Play animation to review parts of cell membrane: http://www.susanahalpine.com/anim/Life/memb.htm
List main parts:
2. http://www.aber.ac.uk/gwydd-cym/cellbiol/transport/index.htm - Fill in the blanks below:
Diffuses easily through lipid bilayer
Do not diffuse through lipid bilayer
II. Passive Transport
http://www.northland.cc.mn.us/biology/Biology1111/animations/transport1.html
Click on Passive Transport and answer the following questions:
1. Define Passive Transport:
2. Hit next and go through the slides to give a brief description of each of the following types of diffusion:
Main components of cell membrane
Integral proteins
Job/description
Fluid lipid Bilayer
3. Types of
Diffusion
Simple Diffusion
Definition/Description
Determinants of diffusion:
When does diffusion “end?”
Animation of diffusion http://www.stolaf.edu/people/giannini/flashanimat/transport/diffusion.swf
Facilitated Diffusion
Osmosis
For animation: http://www.stolaf.edu/people/giannini/flashanimat/transport/osmosis.swf
4. http://www.emc.maricopa.edu/faculty/farabee/BIOBK/bloodcells.gif
Pictures of Red
Blood Cells
Identify what
type of solution
each is placed,
what happened
and why
III. Active Transport
http://www.northland.cc.mn.us/biology/Biology1111/animations/transport1.html
1. Define Active Transport
2. Why is it necessary?
3. Types of Active
Transport
Ion Pumps
Definition/Description
For animation:
http://www.stolaf.edu/people/giannini/flashanimat/transport/atpase.swf
Cotransport
Endocytosis
(Transport of large
molecules)
ENDO = INSIDE
Define:
Phagocytosis:
For animation:
http://www.stolaf.edu/people/giannini/flashanimat/cellstructures/phagocitosis.swf
http://student.ccbcmd.edu/~gkaiser/biotutorials/eustruct/phagocyt.html
Pinocytosis:
For animation:
http://student.ccbcmd.edu/~gkaiser/biotutorials/eustruct/pinocyt.html
Receptor Mediated Endocytosis:
Exocyotosis (EXO = Exit,
outside)
For animation: http://www.susanahalpine.com/anim/Life/endo.htm
Scroll down to “Movement of large molecules across cell membrane http://www.aber.ac.uk/gwydd-cym/cellbiol/transport/index.htm
4. Three different transporters systems are involved in active transport. Use all the websites provide to describe
each and to observe the animations.
Different
Transporter
systems
Uniport
For animation: http://www.stolaf.edu/people/giannini/flashanimat/transport/caryprot.swf
Symport
For Animation: http://www.stolaf.edu/people/giannini/flashanimat/transport/symport2.swf
Antiport
For animation: http://www.stolaf.edu/people/giannini/flashanimat/transport/antiport.swf
5.
http://www.mhhe.com/biosci/esp/2001_g
bio/folder_structure/ce/m3/s5/
Identify and describe what is occurring in
the picture using the website above.
Active Transport in Paramecium
http://www.answers.com/topic/vacuole
http://www.emc.maricopa.edu/faculty/farabee/BIOBK/contractilevac.gif
Paramecium Contractile Vacuole: http://www.stolaf.edu/people/giannini/movies/paramecium/para%20cont.mov
6. What is a contractile vacuole?
7. Why does a paramecium living in freshwater need it?
IV. Summarize the differences between passive and active transport.
Passive Transport
Use of ATP
With or against
concentration
gradient
Different types
Active Transport