Outside+Structures+of+Eukaryotes

== Outside Layers of Eukaryotes: Cell Wall and Cell Membrane   Cell Wall __**(only exists in plant cells)**__:  Structure:  == > .
 * made of cellulose fibers embedded in a matrix of proteins.(Saupe)
 * very porous- The cell wall is covered with pores that allows plasmodesmata to connect with adjacent plant cells. The plasmodesmata is a tube that is connected to the pours and transfers materials in a plant cell to another plant cell. For example, if one plant cell is producing photosynthesis, due to plasmodesmatas, another adjacent plant cell can get the glucose produced from the other cell.(Glenco, 179)
 * Also made of complex carbohydrates(Glenco, 163)

Function:
>
 * maintains and develops the cells shape.(Saupe)
 * prevents the cell from bursting when it is in a hypotonic solution(Saupe)
 * supports and protects the cell.(Glenco, 163)
 * gives cells rigidity and strength against mechanical pressure(Glenco, 163)



Structure:

 * two lipid layers; surface and embedded proteins with attached carbohydrates
 * semi fluid cell boundary
 * selectively permeable
 * <span style="color: rgb(237,84,165);">contains glycolipids and complex lipids, this helps to stabilize the membrane



<span style="color: rgb(255,222,87);">** Function: ** >
 * <span style="color: rgb(218,22,131);">controls passage of materials into and out of cell.
 * <span style="color: rgb(218,22,131);">forms a barrier between the inside and the outside of the cell, so that the chemical environments stay different
 * <span style="color: rgb(218,22,131);">it is selectively permeable so that it can select chemicals that go in and out of the cell.
 * <span style="color: rgb(218,22,131);">provide a stable site for the binding and catalysis of enzymes.



<span style="color: rgb(255,133,0);">__Works Cited:__
Glencoe, McGraw. Bscs Biology: A Molecular Approach. Columbus, Ohio: 2001.<span style="font-family: Georgia,serif;">

Brown, Terry. "Cell Structure and Functions." 1999 http://www.tvdsb.on.ca/WESTMIN/science/sbi3a1/Cells/cells.htm

Childs, Gwen. __UTMB__. "The Cell Membrane." 2003. http://cellbio.utmb.edu/cellbio/membrane.htm

Kaiser, Gary. "The Eukaryotic Cell" 2004. http://student.ccbcmd.edu/~gkaiser/biotutorials/eustruct/cmeu.html

Saupe, Stephen G. "Cell wall- Structure and Function." __Plant Physiology__. 13 Feb. 2007. 17 Dec. 2008 <http://employees.csbsju.edu/ssaupe/biol327/lecture/cell-wall.htm>.

(Cassie/Mr. Hausmann, I found another picture that i want to put on for cell wall but it wont load. can i add it later?)