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=** Homeostasis Terms Wiki **= =Share what you know or resources you find with the rest of your class=
 * =**Explain why a plant in the hot sun might wilt.**=
 * Directions**:
 * Under the heading assigned to your group, share your understanding, give examples, or share resources about the concept
 * **What is it?**
 * **How does it affect the plant wilting?**
 * **What are some examples (example or visual arts (diagrams/clip arts))**
 * Click EDIT above and type (or copy and paste) information into the appropriate place
 * Each heading should have at least 3 additions (for example: one description in your own words, one real-life example, and one link to an additional resource)

Osmosis

 * **Osmosis is**the diffusion of water across a membrane.
 * **Osmosis**is the net movement of water across a selectively permeable membrane driven by a diffrence in solute concentrations on the two sides of the membrane.
 * []

The tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.

Well plants depend on osmosis to bring water from the plants roots to the leaves. The further you go up on a plant the higher the solute concentration which when this happens the osmotic pressure rises. This happens when the osmotic potential draws the water upwards. Other wise osmosis protects the leaves from losing water. There are also guard cells that control the ability to open and thus release moisture. In some cases when the sun is beaming down on the plant this makes the guard cells draw potassium from other cells in the plant tus increasing the osmotic potential.

Vacuole

 * A membrane-bound [|vesicle] found in the [|cytoplasm] of a [|cell] whose function includes [|intracellular] [|secretion], [|excretion], [|storage], and [|digestion]. (D.A)
 * A vacuole is a membrane-enclosed fluid filled sac found in the cells of plants including fungi.(df)
 * 1) //contribute to the rigidity of the plant using water to develop hydrostatic pressure//
 * 2) //store nutrient and non-nutrient chemicals//
 * 3) //break down complex molecules.(df)//


 * [[image:http://media5.picsearch.com/is?kcWnRtyXfachEpFvhb53m60Heifwg9mOUi0gPQ_zlwc link="@http://wzus1.ask.com/r?t=p&d=us&s=a&c=p&app=a16&l=dir&o=0&sv=0a5c4074&ip=ad0a3505&id=9DD1641F6288025AAC8B38DB56ACCD94&q=vacuoles&p=1&qs=272&ac=898&g=55feL5ENcjwhTz&cu.wz=0&en=pi&io=10&ep=&eo=&b=img&bc=&br=&tp=d&ec=20&pt=%20&ex=&url=http%253A%252F%252Fmicro.magnet.fsu.edu%252Fcells%252Fplants%252Fvacuole.html&u=http%3A%2F%2Fimages.ask.com%2Ffr%3Fq%3Dvacuoles%26desturi%3Dhttp%253A%252F%252Fmicro.magnet.fsu.edu%252Fcells%252Fplants%252Fvacuole.html%26initialURL%3Dhttp%253A%252F%252Fwww.ask.com%252Fpictures%253Fo%253D0%2526l%253Ddir%2526qsrc%253D272%2526q%253Dvacuoles%26fm%3Di%26ac%3D898%26fsel%3D2%26ftURI%3Dhttp%253A%252F%252Fimages.ask.com%252Ffr%253Fq%253Dvacuoles%2526desturi%253Dhttp%25253A%25252F%25252Fmicro.magnet.fsu.edu%25252Fcells%25252Fplants%25252Fvacuole.html%2526imagesrc%253Dhttp%25253A%25252F%25252Fmicro.magnet.fsu.edu%25252Fcells%25252Fplants%25252Fimages%25252Fplantvacuolesfigure1.jpg%2526thumbsrc%253Dhttp%25253A%25252F%25252Fmedia5.picsearch.com%25252Fis%25253FkcWnRtyXfachEpFvhb53m60Heifwg9mOUi0gPQ_zlwc%2526o%253D0%2526l%253Ddir%2526thumbuselocalisedstatic%253Dfalse%2526thumbwidth%253D128%2526thumbheight%253D118%2526fn%253Dplantvacuolesfigure1.jpg%2526imagewidth%253D288%2526imageheight%253D266%2526fs%253D35%2526f%253D2%2526fm%253Di%2526fsel%253D2%2526ftbURI%253Dhttp%25253A%25252F%25252Fwww.ask.com%25252Fpictures%25253Fq%25253Dvacuoles%252526page%25253D1%252526o%25253D0%252526l%25253Ddir%252526pstart%25253D0%26qt%3D"]](df)


 * vacoule has to do with plant wilting because the vacuoles are the part of the call that contains the water. If the vacuoles dry out the cells the cells will start to dry out and start wilting because it hasnt have any water. (D.F)

> Read more: [|http://wiki.answers.com/Q/How_does_a_vacuole_assist_in_homeostasis#ixzz1fNoZR8Jv]
 * The vacoule always has some amount of water present inside it. If the cell contains more water, it absorbs the water and allows it to diffuse out of the cell. If the cell contains less water, the water from the vacoule will re-enter the cell to maintain its turgidity (d.a)

Balance (Equilibrium)

 * A plant keeps a state of homeostasis when there is too much water out side of it the cell. The cell then absorbs some of the water from the out side and brings it into the inside. This form of homeostasis works the other way around when there is too much water inside of the cell it then releases water outside. By keeping this form of homeostasis the plant can then adapt to its environment and survive. (E.Q)

Compartments (of living things)
[|Http://www.ncbi.nlm.nih.gov/About/primer/genetics_cell.html]
 * a separate aspect, function, or the like: the compartments of the human mind.
 * []
 * ** Cells **
 * are the structural and functional units of all living organisms ||

When the cell contants peel away from the cell wall cell membrane becomes visible and the plant wilts. Rubi R ,Hope H,Paul E,Manuel V.

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Permeability

 * The ability for molecules such as water to pass through the membrane barrier.

Membrane
> (T.G) > (T.G)
 * The [|cell membrane] is a thin semi-permeable membrane that surrounds the [|cytoplasm] of a [|cell](S.V)
 * Cell membranes in plants act to control the movement of dissolved substances into and out of the cell and to sense external signals or changing conditions. (M.S.)
 * The cell membrane blocks out the viruses or things that would harm the cell's also makes sure that the good things that could help the cell survive or could help the cell live longer to produce more and more cells. (L.G.)
 * Loss of turgor causes wilting. (L.P)
 * **In extremely dry soils the Permanent **** Wilting Point may occur. This is the water potential at which plant cells loose their turgor pressure and can't regain it even when transpiration ceases . Wilting is the visible symptom of PWP. This means that the water potential of soil water is less than that in the roots (T.G S.V L.G) **
 * A plant cell in zoe hypotonic solution will absorb water by [|endosmosis], so that the increased volume of water in the cell will increase pressure, making the [|protoplasm] push against the cell wall, a condition known as [|turgor]. (S.V)
 * Turgor makes plant cells push against each other in the same way and is the main line method of support in non-woody plant tissue.(L.G)
 * Without the stiffness of the plant cells the plant would fall under its own weight. This is the same reason that when we pour water into a potted plant it perks up. (T.G)
 * []
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