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Dictionary » S » Selective permeability

Selective permeability

Definition

noun

A feature and a function of the plasma membrane that is essential to maintain homeostasis by regulating the passage of some substances while preventing others from entering the cell.


Supplement

The plasma membrane is capable of being selectively permeable because of its structure, which is composed of a bilayer of hydrophobic phospholipids, and proteins that act as transporters or channels for certain molecules (e.g. ions).


See also: fluid mosaic model, plasma membrane.


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Re:

... to the cytoplasm. (vacuole's tonoplast has an attribute named "selective permeability" cause it) I hope you had got what I mean.

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by Maatomaat
Thu Nov 24, 2011 10:40 am
 
Forum: Cell Biology
Topic: Plant vacuole
Replies: 8
Views: 3994

Prokaryotes and Eukaryotes

... reproduction, usually by binary fission -plasmalemma: rigid, very selective -nucleoid is a circular chromosome (DNA) without nuclear envelope ... division: indirect: mitosis and meiosis -plasmalemma:flexible, high permeability -true nucleus with envelope -http://en.wikipedia.org/wiki/Eukaryote

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by nikko6500
Mon Jun 20, 2011 7:18 pm
 
Forum: Cell Biology
Topic: Prokaryotes and Eukaryotes
Replies: 7
Views: 3745

*PLEASE URGENT HELP - FLUID MOSAIC MODEL*

Of course they won't answer you. Talk about receptors, selective permeability and bacteria and viruses. I'm sure you can find diseases etc that relate to it.

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by mith
Fri Mar 13, 2009 4:48 am
 
Forum: Cell Biology
Topic: *PLEASE URGENT HELP - FLUID MOSAIC MODEL*
Replies: 4
Views: 9483

Re: HoMeWoRk HeLp

... your getting the right idea but, when you say: 2. Is the membrane 100% selective? Explain. No, It is selectively-permeable meaning some substances ... membranes, but in this case the tubing is a cellulose membrane, and permeability is not a function of proteins.

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by MichaelXY
Sun Mar 09, 2008 1:06 am
 
Forum: General Discussion
Topic: HoMeWoRk HeLp
Replies: 21
Views: 9710

Epithelial Cells

... protection, transcellular transport, sensation detection, and selective permeability. But we need perticular query to solve. Thank You Dip Jyoti Chakraborty

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by dipjyoti
Sun Mar 11, 2007 8:59 am
 
Forum: Cell Biology
Topic: Epithelial Cells
Replies: 4
Views: 2288
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