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Diffusion is the movement of molecules or partocles from an area of high concentration to an area of lower concentration, and Facilitated diffusion is when substances difuse across cell membranes more rapidly than you might expect.
Wiki User
∙ 15y ago
Wiki User
∙ 11y agoFacillated diffusion requires the assistance of carrier and channel proteins to allow the diffusion of substances. It is still called diffusion because no energy is required and the particles still move in the direction of the concentration gradient.
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What is meant by faciliated diffusion?
Facilitated diffusion (or facilitated transport) is a form of passive transport that is facilitated by transport proteins. Most often it is used to transport polarized molecules (such as glucose and amino acids) across the cell membrane.
What two processes transport materials through the semi permeable membrane?
There's more than two. There's diffusion, facilitated diffusion, and active transport. And water moves by osmosis
What is diffusion a natural movement of molecules from?
in the normal diffusion the substance move from the area of greater concentration to that of lower concentration. .... but i never know what do we mean be "faciliated" plz specify
What happens to the rate of diffusion as temperature increases?
When speaking about deviation from ideal gas behavior, an increase in temperature will result in the molecules having less time to interact as they pass by each other. A low temperature will permit more time for the molecules to interact, as they are moving at a slower speed than a higher temperature molecule. Hope that helps!
What influences diffusion of ions across the membrane?
distance involved =diffusion at short distances occurs at a greater rate than diffusion at long distances area involved= diffusion over short distance occurs at a greater rate than diffusion over long distances Barriers=thicker barriers slow down rates of diffusion
How is active transport different than simple and facilitated diffusion?
simple and facilitated diffusion don't require energy and are forms of passive transport. Active transport requires energy
Does facilitated diffusion require the Cell to use energy?
No, there is no ATP used in facilitated diffusion, because it is a form of passive transport. It only differs from normal diffusion in that it uses transport proteins to move larger or more polar molecules across the membrane of the cell.
What is meant by faciliated diffusion?
Facilitated diffusion (or facilitated transport) is a form of passive transport that is facilitated by transport proteins. Most often it is used to transport polarized molecules (such as glucose and amino acids) across the cell membrane.
What is facilitated diffusion often to transport?
It's often used to transport nutrients across the epithelium of the gut. It's also used to reabsorb nutrients from filtrate in the kidney. Any time the body needs to move substances against their concentration gradient without wasting excess ATP, you might expect cells to use facilitated diffusion. Facilitated diffusion usually requires less ATP per molecule moved than does active transport.
Why is facilitated diffusion faster than simple diffusion?
Facillatated diffusion is faster than simple diffusion when solute concentration is low because it uses channels to transport molecules throught the lipid bilayer. Simple diffusion depends upon concentration gradients so the net movement of diffusing molecules depends on the concentration gradient, thus the rate of diffusion is directly proportional to the concentration gradient. Simple diffusion is also a type of passive transport, which requires no energy input, whereas facilitated diffusion is protein mediated transport. Passive diffusion of solute into a cell is linearly related to the concentration of solute outside the cell. Carrier proteins increase the rate of diffusion by allowing more solute to enter the cell. Facilitated diffusion, however, approaches a maximum rate as the carrier proteins become saturated with solute.
How can some substance diffuse through a cell membrane at faster rate than by diffusion alone?
In facilitated diffusion, there are temporary openings in the cell membrane that enable certain molecules to pass through quickly.
Why does active transport require more energy than osmosis or facilitated diffusion?
Active transport requires more energy than diffusion this is because during active transport, the molecules are being transported against and toward the concentration gradient whereas in diffusion, the molecules go from the concentration gradient.
Facilitated diffusion is often used to transport what?
It's often used to transport nutrients across the epithelium of the gut. It's also used to reabsorb nutrients from filtrate in the kidney. Any time the body needs to move substances against their concentration gradient without wasting excess ATP, you might expect cells to use facilitated diffusion. Facilitated diffusion usually requires less ATP per molecule moved than does active transport.
What two processes transport materials through the semi permeable membrane?
There's more than two. There's diffusion, facilitated diffusion, and active transport. And water moves by osmosis
What happen to cell if external environment has greater solute than internal environment of cell?
Water will leave the cell by facilitated diffusion and the cell will shrink and die.
When a substance moves across the plasma membrane along a concentration gradient at a rate faster than would be expected by simple diffusion alone but without the expenditure of metabolic energy?
It is called facilitated diffusion. It is a type of passive transport.
How are diffusion and active transport different?
There are two types of diffusion. Facilitated and non facilitated. Diffusion occurs when there is a concentration gradient. That is, when an area has more concentration than the other area. Diffusion is used to transfer particles from one place to another. Active transport is used to transfer particles, usually occurring against a concentration gradient. Active transport requires energy to occur however, diffusion does not. There are two types of diffusion. Facilitated and non facilitated. Diffusion occurs when there is a concentration gradient. That is, when an area has more concentration than the other area. Diffusion is used to transfer particles from one place to another. Active transport is used to transfer particles when there is no concentration gradient. Active transport requires energy to occur however, diffusion does not.
