what is called as osmosis?
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Osmosis is the passage of water from a region of high water concentration through a semi-permeable membrane to a region of low water concentration...
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Basically by osmosis. The cell absorbs nutrients and oxygen through the cell wall from the blood circulating in the capillaries. The oxygen is absorbed by the body in an exchange in the lungs and nutrients are absorbed through the small and large intestine and they all travel in the blood stream to the cells.
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Osmosis is a type of diffusion that relates directly to water passing the cell membrane. Diffusion is particle movement down the concentration gradient or to an area of less concentration of any substance
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Plasmolysis: Shrinkage of the protoplasm in a plant or bacterial cell, caused by loo of water through osmosis.
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Because of osmosis (the diffusion of water through a membrane) the water will move from the higher concentration of water to the lower concentration of water. (From the solution with less sugar, to the solution with more sugar, because it has less water in it with the sugar taking up the space.)
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because in osmosis/ diffusion, solvent / solute moves across a barier to balance the concentration. since the water is saltier than normal, either water has to come out of the cells to dilute it, or salt has to go into the cells to make them more concentrated. either one is bad for cells, but in terms of osmosis, it is the water that does the moving, leaving the cells dehydrated.
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Diffusion is the normal migration of molecules from an area of higher concentration to an area of lower concentration until and equal concentration is achieved.  Everything in nature does this.\nExample-open a bottle of perfume then pretty soon the person in the next room can smell it and so on.\nOsmosis is diffusion or the movement of water across a semipermeable membrane( a cell membrane that lets some stuff in and keeps others out.).  It can go in or out of the cell based on the concentration.  Water is a common carrier molecule for other substances.\nThus diffusion and osmosis are the same except osmosis must have a membrane crossed.
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on drinking lot of water the osmotic pressure of blood falls and excess water is then absorbed by the nephron of the kidney and excreated out to maintain the osmocity of blood
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yes... it's called reverse osmosis.\n\nBasically it pushes the sea water through a filter that doesn't allow the salt to pass.\n\nAlso there is turning the water into steam and then condensing it into liquid again.  This leaves the salt behind as it is converted to steam.\n\nDesalinization is usually expensive and not very efficient either.
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Search this site powered by FreeFind\n\n \n[HOME] [HEURISTICS] [NUMBERS AND MATH] [UNITS AND MEASURES] [ATOMIC STRUCTURE] [ELEMENTS] [PERIODIC TABLE] [STATES OF MATTER] [COMPOUNDS] [REACTIONS] [MOLS, PERCENTS, AND STOICHIOMETRY] [REDOX AND ELECTROPLATING] [GASES] [SOLUTIONS] [ACIDS AND BASES] [KINETICS] [THERMOCHEMISTRY] \n\n  SOLUTIONS\n\n\nProperties of solutions\nOther types of mixture\nConcentration\nDissolving solids into liquids\nDissolving gases into liquids\nLiquids in liquids\nSolubility\nColligative properties of solutions\nConcentration math in stoichiometry\nMath problems in concentration and solution-making\n\n \n\n \n\n \n\nPROPERTIES OF SOLUTIONS\n\n \n\nA solution is a mixture of materials, one of which is usually a fluid. A fluid is a material that flows, such as a liquid or a gas. The fluid of a solution is usually the solvent. The material other than the solvent is the solute. We say that we dissolve the solute into the solvent.\n\nSome solutions are so common to us that we give them a unique name. A solution of water and sugar is called syrup. A solution of sodium chloride (common table salt) in water is called brine. A sterilized specific concentration (0.15 molar) of sodium chloride in water is called saline. A solution of carbon dioxide in water is called seltzer, and a solution of ammonia gas in water is called ammonia water.\n\nA solution is said to be dilute if there is less of the solute. The process of adding more solvent to a solution or removing some of the solute is called diluting. A solution is said to be concentrated if it has more solute. The process of adding more solute or removing some of the solvent is called concentrating. The concentration of a solution is some measurement of how much solute there is in the solution.\n\nIt might initially offend your sensibilities to consider a solution in which the solvent is a gas or a solid. The molecules of a gas do not have much interaction among them, and so do not participate to a large extent in the dissolving process. Solids are difficult to consider as solvents because there is a lack of motion of the particles of a solid relative to each other. There are, however, some good reasons to view some mixtures of these types as solutions. The molecules of a gas do knock against each other, and the motion of a gas can assist in vaporizing material from a liquid or solid state. The fan in a 'frost free' home freezer moves air around inside the freezer to sublimate any exposed ice directly into water vapor, a process clearly akin to dissolving. Solid metals can absorb hydrogen gas in a mixing process in which the metal clearly provides the structure.\n\nTrue solutions with liquid solvents have the following properties:\n\nPROPERTIES OF SOLUTIONS\n\n   1. The particles of solute are the size of individual small molecules or individual small ions. One nanometer is about the maximum diameter for a solute particle.\n   2. The mixture does not separate on standing. In a gravity environment the solution will not come apart due to any difference in density of the materials in the solution.\n   3. The mixture does not separate by common fiber filter. The entire solution will pass through the filter.\n   4. Once it is completely mixed, the mixture is homogeneous. If you take a sample of the solution from any point in the solution, the proportions of the materials will be the same.\n   5. The mixture appears clear rather than cloudy. It may have some color to it, but it seems to be transparent otherwise. The mixture shows no Tyndall effect. Light is not scattered by the solution. If you shine a light into the solution, the pathway of the light through the solution is not revealed to an observer out of the pathway.\n   6. The solute is completely dissolved into the solvent up to a point characteristic of the solvent, solute, and temperature. At a saturation point the solvent no longer can dissolve any more of the solute. If there is a saturation point, th
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Osmosis in potatoes. \nPut pieces of potato in different conc. of glucose solution and look at the changes.
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Osmosis is the movement of water thru a semi-permeable membrane.  Water would move from an environment of low solute concentration to an environment of high solute concentration.  Only the water molecules move, not the solutes, because the membrane is only permeable to water.  The reason that water molecules move is becaues things like to be in equilibrium.  Because the side of higher solute concentration has more matters relative to the whole system, that's why it attracts water there too.  Another way you can think about is that the side where there are more solutes provide more surface areas for the water molecules to have more contact with (more weak interactions between the water and the solutes), therefore water want to go there.  So water likes to go to where there isn't a lot of water.  (you might ask then why wouldn't the solutes move to the side that has less solute.  They won't, because your membrane is only permeable to water.)  So if you are solving problems like these, must pay close attention to the membrane permeability.\n\nDiffusion is a similar concepts.  Things like to go where there are less of them.  In the above example, because the environment has a lot of solute, BUT little water, that's why water goes to that size.  Things tend to go toward disorder (entropy), so more matters means more disorder.\n\nActive transport-this means that the movement of matters from one side to the other can only be possible if there are help, such as protein pumps.  I guess the best example is the sodium-potassium pumps.  Energy is used (main energy source is ATP) so that sodium ions and potassium ions are pumped into and out of the cell, respectively.  But again, this is also based on the concept that things tend to go to the side that there are less of them.\n\nHope that helps.  If you find some terms confusing, just go to wiki or answers.com and search for them.\nGoodluck!
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Yes, osmotically refers to the water and salt ion gradients inside and outside a cell's, or any selectively permeable, membrane. There are three states of osmotic condition. Isotonic = similar inside and outside.  Hypertonic where there is more salt ions outside fo the cell.  Water osmotically diffuses out of the cell.  This leads to cellular creanation Finally, hypotonic where there is more salt ions inside the cell  Water osmotically diffuses into the cell.  This is osmosis leading to cytolysis.
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Osmotic pressure is the pressure necessary to reverse osmosis and return to the initial condition. It would be the difference between the liquid levels at equilibrium and the initial liquid level in our thistle tube example above.
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Yes; think of the cell as a sack filled with stuff surrounded by a semipermeable membrane. Water diffuses through the pores based on its concentration. That is, water goes from an area of great to less concentration. Since the distilled water by definition has no solute and is 100 per cent pure and since the concentration of the water in the cell is diluted by the presence of small particles (almost one percent), water flows from the outside to the inside very quickly. The membrane is stretched so much by the infusion of water that it bursts.
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Osmosis is a special type of diffusion that only water can do.In a area of high water the water will move to a area of low water! Definition is....osmosis is a form of diffusion were water moves from a region of high water concentration to a region of low water concentration across a semi-permeable membrane!
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ANSWER NO. 1\nOsmosis - a definition \n1. Movement of a solvent through a semipermeable membrane into a solution of higher concentration that tends to equalise the concentration on both sides of the membrane. \n2. A process of absorption or diffusion - osmotic adj. \n3. An innovative rock band from Northampton.\n\nANSWER NO. 2\nOsmosis: the movement of water molecules from an area of high concentration to an area of low concentration. \nCell membranes are completely permeable to water, therefore, the environment the cell is exposed to can have a dramatic effect on the cell. \nHypertonic Solutions: contain a high concentration of solute relative to another solution (e.g. the cell's cytoplasm). When a cell is placed in a hypertonic solution, the water diffuses out of the cell, causing the cell to shrivel. \n\nANSWER NO. 3\nA fully manageable and complete application made specialy for the paediatric (pediatric) sector.\n\nANSWER NO. 4\nOsmosis is the movement of water through a semi-permeable membrane from a region of low solute potential to a region of high solute potential (or equivalently, from a region of high solvent potential to a region of low solvent potential). The semi-permeable membrane must be permeable to the solvent, but not to the solute, resulting in a pressure gradient across the membrane. Osmosis is a natural phenomenon. However, it can be artificially opposed by increasing the pressure in the section of high solute concentration with respect to that in the low solute concentration. The force per unit area required to prevent the passage of solvent through a selectively-permeable membrane and into a solution of greater concentration is equivalent to the turgor pressure. Osmotic pressure is a colligative property, meaning that the property depends on the concentration of the solute but not on its identity. It is an important topic in biology because it provides the primary means by which water is transported into and out of cells.\n\nBasic explanation of osmosis\nConsider a permeable membrane, such as visking tubing, with apertures small enough to allow water molecules, but not larger molecules, to pass through. Suppose the membrane is in a volume of pure water. At a molecular scale, every time a water molecule hits the membrane, it has a defined likelihood of passing through. In this case, since the circumstances on both sides of the membrane are equivalent, there is no net flow of water through it. However, if there is a solution on the other side, that side will have fewer water molecules and thus fewer collisions with the membrane. This will result in a net flow of water to the side with the solution. Assuming the membrane does not break, this net flow will slow and finally stop as the pressure on the solution side becomes such that the diffusion in each direction is equal. Osmosis can also be explained via the notion of entropy, from statistical mechanics. As above, suppose a permeable membrane separates equal amounts of pure solvent and a solution. Since a solution possesses more entropy than pure solvent, the second law of thermodynamics states that solvent molecules will flow into the solution until the entropy of the combined system is maximized. Notice that, as this happens, the solvent loses entropy while the solution gains entropy. Equilibrium, hence maximum entropy, is achieved when the entropy gradient becomes zero.\n\nExamples of osmosis\nMany plant cells perform osmosis. This is because the osmotic entry of water is opposed and eventually equaled by the pressure exerted by the cell wall, creating a steady state. In fact, osmotic pressure is the main cause of support in plant leaves.\n\nWhen a plant cell is placed in a hypertonic solution, the water in the cells moves to an area higher in solute concentration, and the cell shrinks and so becomes flaccid [pron. flaxid]. (This means the cell has become plasmolysed - the cell membrane has completely left the cell wall due to lack of water pressure