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Why the line-with-gaps model is not suitable to explain facilitated diffusion?
Facilitated diffusion is a carrier-mediated form of transport across a membrane. The line-with-gaps model doesn't show the carrier proteins that are in the cell membrane. These proteins are what help facilitated diffusion occur.
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?
Two processes that transport materials through a semi-permeable membrane are passive diffusion, which involves the movement of molecules from an area of high concentration to an area of low concentration, and facilitated diffusion, which involves the transport of molecules across the membrane with the help of specific carrier proteins.
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 are the factors that affect facilitated diffusion and why do they affect it?
Factors affecting diffusion are: 1) Temperature: The higher the temperature, the higher the rate of diffusion. Example: Put potassium permanganate in a beaker with water (room temp.) and do the same in a beaker with water (boiled). The potassium permanganate would spread faster in hot water. 2) Size of particle: The bigger the particle, the higher the energy to diffuse. 3) State of matter: Solids take more time to diffuse compared to liquids, liquids take more time to diffuse compared to gases, and gases take less time to diffuse compared to liquids and solids. Example: Light an incense stick. The smell of the smoke (from the stick) would reach you as soon as it is burned. The smoke diffused very fast. 4) Nature of matter: The denser the matter, the slower the rate of diffusion. Example: Honey in water would diffuse slower than ink in water. (Honey is denser than ink.)
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
Why the line-with-gaps model is not suitable to explain facilitated diffusion?
Facilitated diffusion is a carrier-mediated form of transport across a membrane. The line-with-gaps model doesn't show the carrier proteins that are in the cell membrane. These proteins are what help facilitated diffusion occur.
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.
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 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.
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 would the body use facilitated diffusion to move the amino acids instead of diffusion?
Facilitated diffusion is used for amino acids because they are polar molecules and cannot diffuse through the cell membrane on their own. Facilitated diffusion relies on carrier proteins to transport amino acids across the membrane, helping them move from an area of high concentration to low concentration. This process is quicker and more efficient than simple diffusion for polar molecules.
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.
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.
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.
What two processes transport materials through the semi permeable membrane?
Two processes that transport materials through a semi-permeable membrane are passive diffusion, which involves the movement of molecules from an area of high concentration to an area of low concentration, and facilitated diffusion, which involves the transport of molecules across the membrane with the help of specific carrier proteins.
What is the major difference between between facilitated diffusion and active transport?
Facilitated diffusion occurs in order to maintain homeostasis within a cell. If there is more of something, such as water, inside a cell than outside the cell, diffusion allows the water to flow out of the cell so that an equal amount of water molecules exists both inside and outside the membrane. This requires little or no energy from the cell itself. Active transport is when the cell takes in or excretes material through the membrane so that the amount of material inside and outside the membrane is different. This requires energy from the cell to occur.
