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Plasma membranes

plasma membrane

(Science: cell biology) The external, limiting lipid bilayer membrane of cells.


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Membranes/Transport

... etc. Our teacher then posed this question that I'm really stumped on, however....What is present in the space between the cell wall and the plasma membrane of a plasmolyzed cell? Is it the 20% sucrose solution that we immersed the cells in? Is it simply water? Or neither? Thanks for the ...

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by itsamemario
Tue Feb 17, 2009 6:53 am
 
Forum: Cell Biology
Topic: Membranes/Transport
Replies: 2
Views: 543

Re: Cell Membranes

Well first of all, are you talking about cell walls, or plasma membranes? Assuming you mean plasma membranes, these have a lipid bi-layer (hydrophilic on the outside ...

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by Syne
Tue Jan 13, 2009 11:08 pm
 
Forum: Cell Biology
Topic: Cell Membranes
Replies: 6
Views: 1076

membrane cholesterol

... the risk of cardiovascular disease and cholesterol loading into plasma membranes probably has a role in the disease. This in not what I'm working on, but would like ...

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by ianawhite
Tue Dec 09, 2008 7:31 pm
 
Forum: Cell Biology
Topic: membrane cholesterol
Replies: 4
Views: 798

Re: membrane permeability - let's make it clear!

from what I know, all membranes are freely permeable to oxygen, CO2 and other gaseous substances. Membranes ... carrier. It's not an exception to anything, as far as I know. If you expose the plasma membrane to long neutral fats I would say they would diffuse into the cell. What ...

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by MrMistery
Mon Dec 01, 2008 12:27 am
 
Forum: Cell Biology
Topic: membrane permeability - let's make it clear!
Replies: 1
Views: 1140

membrane permeability - let's make it clear!

It is a such contradictory literature on permeability of biological membranes, I would like to see clearly now. What substances can FREELY travel ... cells: does the carrier release them upon contacting the target cells' plasma membranes and after diffusion though the membrane would another carrier ...

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by kk
Sun Nov 30, 2008 8:01 pm
 
Forum: Cell Biology
Topic: membrane permeability - let's make it clear!
Replies: 1
Views: 1140
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