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Are solutes always able to diffuse through a cell's selective permeable membrane?
Wiki User
∙ 7y ago
No, cell membranes are semi-permeable, meaning they allow some solutes to pass through - but not others.
Wiki User
∙ 12y ago
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What is the difference between a semi-permeable and a partially permeable membrane?
An impermeable membrane is that through which no substance can pass. Semipermeable membranes are those that let only solvents, like water, to pass through it. Permeable membranes are those that let solvent and solutes, like ions and molecules, to pass across it. There are also selectively permeable membranes, i.e., membranes that besides allowing the passage of solvent, let only some specific solutes to pass while blocking others. See link:
On which side of a selectively permeable membrane does osmosis exert pressure?
A selectively permeable membrane (also known as a differentially permeable membrane or a semi-permeable membrane) is permeable to the solvent but not to solutes.In cells, the solvent is always water.All cell membranes (such as plasma membranes and vacuole membranes) are selectively permeable.This means that water can cross these membranes by osmosis. This will happen when the total concentration of solutes on one side of the membrane is different from that on the other side.The process is passive (requiring no energy input) and you can think of it as being an attempt by nature to "even up" the difference. Water passes into the stronger solution, i.e. the one with the higher concentration of solutes. If equilibrium is reached, the process will stop.One example of the importance of osmosis: mature plant cells contain a central vacuole, holding an aqueous solution of various chemical compounds. These solutes create an osmotic pressurethat attracts water, swelling the vacuole and giving the cells turgor. The turgor of cells in well-watered plants holds up soft parts like leaves. If a plant lacks water, the vacuoles shrink and the leaves wilt.
What are solutes that can destroy cell membrane?
detergents or organic solvents
What fills the space between cell wall and membrane after plasmolysis?
The cell membrane is a selectively permeable membrane that will only let water and solutes across it. The cell membrane freely allows pretty much everything to pass across it, meaning that things unable to pass the membrane back up and push it away from the cell wall. Therefore the gap is filled with the SUGAR SOLUTION that is surrounding the cell.
If two solutions having different osmolarities are separated by a water-permeable membrane will there be a change in the volume of the two compartments if the membrane is impermeable to solutes?
Water will flow from a region of higher concentration to lower concentration until the two osmolarities are equal if the membrane is impermeable to the solute. A change in the volume of the solution would be the result. If it is permeable then the solute will diffuse simultaneously from the higher solution to the lower solution until equilibrium is reached. The volume will not change in this case.
What involves the movement of solutes across a selectively permeable membrane by the process of difussion?
facilatated diffusion
What is selecticely permeable?
Selective permeability usually refers to the ability of a membrane to regulate the movement of materials. An intervening membrane can physically prevent a solute from diffusing down its concentration gradient. This allows cells, for example, to maintain a cytoplasm with a different composition than the extra-cellular fluid. A membrane may contain protein channels for the passive diffusion of a specific substance, actively acquire or discharge others, and have no channels to facilitate the movement of another. Thus, the membrane is selectively permeable for different solutes, usually depending on the needs of the cell.
What is the difference between a semi-permeable and a partially permeable membrane?
An impermeable membrane is that through which no substance can pass. Semipermeable membranes are those that let only solvents, like water, to pass through it. Permeable membranes are those that let solvent and solutes, like ions and molecules, to pass across it. There are also selectively permeable membranes, i.e., membranes that besides allowing the passage of solvent, let only some specific solutes to pass while blocking others. See link:
Which the two structure in plant cell are selectively permeable allowing molecules of water and small solutes to pass through but preventing the passage of large solute molecule?
Cell membrane and sap vacuole membrane
Is it possible to completely separate two solutes in one run by carefully selecting the membrane size?
No, only 1/2 of the smaller solute will diffuse across the membrane and one half will stay behind:)
What is the difference between a permeable and a semi permeable membrane?
There is no real difference other than the wording; both semi-permeable and partially-permeable mean the ability to allow some substances to pass.However, OCR examiners for AS Biology have said that you should "not use the term semi-permeable when referring to cell membranes that allow water and other solutes to cross them" but should "refer to them as partially permeable."
What are the properties of solutes that can cross a membrane by simple diffusion?
The size of the molecule. Usually if a membrane is semi - permeable (only allows some molecules through by simple diffusion) the molecule that will be allowed through most is H2O(water).
What is a membrane protein that allows specific charged molecules to pass through from one side of the membrane to another?
A membrane protein that permits the passage of specific substances is selectively permeable. They allow the solvent as specific solutes to pass through.
Which the structure in plant cell are selectively permeable allowing molecules of water and small solutes to pass through but preventing the passage of large solute molecule?
only plasma membrane
Which solutes diffuse from patient's blood during dialysis?
urea
Is dialysis tubing permeable to iodine?
No, tubing is not permeable at all, although the dialyzer is permeable to many solutes, depending on the type of dialyzer prescribed by a physician.
What are the differences between dialysis and electrodialysis?
searching By : Mohamed Albarouni Dialysis is a membrane process where solutes (MW~<100 Da) diffuse from one side of the membrane (feed side) to the other (dialysate or permeate side) according to their concentration gradient. First application in the 70's Electrodialysis is a membrane process in which ions are transported through ion permeable membranes from one solution to another under the influence of an electrical potential gradient. First applications in the 30's.
