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Membranes (of the plasma type) & Tranport

The exciting world of multi-cellular life
Construction of the Cell Membrane

Class Notes & Powerpoints

1._plasma_membrane_-_structure_joc.pdf
File Size: 937 kb
File Type: pdf
Download File

3._osmosis_part_i.pdf
File Size: 666 kb
File Type: pdf
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2._diffusion_joc.pdf
File Size: 793 kb
File Type: pdf
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3._osmosis_part_ii.pdf
File Size: 782 kb
File Type: pdf
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4._active_ &_bulk_transport.pdf
File Size: 669 kb
File Type: pdf
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plasma_membranes_wjec.ppt
File Size: 3187 kb
File Type: ppt
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Official WJEC presentation on membranes and transport above.

Complete summary of the topic with animations below.
membanestransport_summary.ppt
File Size: 2351 kb
File Type: ppt
Download File

Media & Activities

The Plasma Membrane

Keywords: Fluid mosaic model, Phospholipid, Polar phosphate head, non-polar fatty acid tail, intrinsic protein (spans the membrane), extrinsic protein (only in part of the membrane), glycoprotein, glycolipid, cholesterol 

More specific labels for proteins: Ion channel, voltage gated channel, ion pump, co-transport channel protein, anti-transport channel protein

Additional labels- integral (in or partly in the membrane), peripheral (stuck to the outside)
Picture
http://quizlet.com/19577920/plasma-membrane-flash-cards/ 
http://www.s-cool.co.uk/a-level/biology/cells-and-organelles/revise-it/the-cell-membrane
http://alevelnotes.com/Cell-Membranes/12#/?id=12

Transport

Can you determine which transport mechanism is represented by each of the below flash animations? Try describing each process in turn.
How many marks is each description worth you ask?

  • Diffusion = 2 marks
  • Facilitated diffusion = 3 marks
  • Active transport = 5 marks (3 marks for the basics, 2 for explaining one of the theories of how it works)
  • Osmosis = 3-5 (depending on what has to be interpreted in the question)
Picture
OSMOSIS: How plasmolysis (cytoplasm & vacuole shrinking and leading to separation of plasma membrane & cell wall) happens.
Picture
OSMOSIS: The significance of cell turgor (and flaccidness)
Picture
Picture
Test yourself on passive transport! By clicking the Quiz button!!!

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