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Does facilitated diffusion move a substance following its concentration gradient with the aid of a carrier protein?
No.
All diffusion, including facilitated diffusion, results in a substance spreading out, so there is a general (net) movement away from higher concentrations to lower ones.
"Facilitated" just means that special proteins in the cell membrane let substances through that could not get through any other part of the membrane. It's like wanting to get the other side of a wall. A door facilitates your progress!
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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?
The process is called facilitated diffusion, as it relies on carrier proteins or channel proteins to aid in the movement of the substance across the membrane. It does not require the cell to use energy because the movement is still following the direction of the concentration gradient.
Is movement of a substance down its concentration gradient a passive transport?
Yes, movement of a substance down its concentration gradient is considered passive transport because it does not require energy expenditure by the cell. The substance moves from an area of high concentration to an area of low concentration through processes like simple diffusion, facilitated diffusion, or osmosis.
What processes could result in the net movement of a substance into a cell if the substance is more concentrated in the cell than in the surroundings?
Active transport or facilitated diffusion could result in the net movement of a substance into a cell if it is more concentrated inside the cell than in the surroundings. In active transport, energy is required to move the substance against its concentration gradient. In facilitated diffusion, specific carrier proteins help the substance move into the cell down its concentration gradient.
Give 2 examples of passive transport?
Passive transport is when molecules pass freely through the membrane moving from the higher concentration area to the region of lower concentration. Three examples of this are diffusion, osmosis, and active transport.
The movement of a substance from where there is large amounts and low amounts?
This is called diffusion. Substances move randomly, from an area of high concentration to an area of low concentration. Osmosis is a specific type of diffusion that only involves the random movement of water.
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?
The process is called facilitated diffusion, as it relies on carrier proteins or channel proteins to aid in the movement of the substance across the membrane. It does not require the cell to use energy because the movement is still following the direction of the concentration gradient.
How does a polar substance get across a cells plasma membrane without the expenditure of energy assuming it is more concentrated outside if the cell?
A polar substance can cross a cell's plasma membrane through facilitated diffusion, which does not require energy expenditure. In this process, specific transport proteins help the polar substance move down its concentration gradient from an area of higher concentration to an area of lower concentration. This movement occurs until equilibrium is reached.
The spreading out of a substance from an area of high concentration to an area of low concentration is called .?
diffusion
What is The net movement of particles of a substance from a high concentration to a low concentration?
DIFFUSION DIFFUSION
Effect of the presence of other molecules on the diffusion of a given substance?
The presence of other molecules can affect the diffusion of a given substance by changing the concentration gradient, which in turn affects the rate of diffusion. If other molecules are blocking the pathway or binding to the diffusing substance, diffusion may be slowed down. On the other hand, if the other molecules are helping to carry the diffusing substance, diffusion may be facilitated.
Is movement of a substance down its concentration gradient a passive transport?
Yes, movement of a substance down its concentration gradient is considered passive transport because it does not require energy expenditure by the cell. The substance moves from an area of high concentration to an area of low concentration through processes like simple diffusion, facilitated diffusion, or osmosis.
What processes could result in the net movement of a substance into a cell if the substance is more concentrated in the cell than in the surroundings?
Active transport or facilitated diffusion could result in the net movement of a substance into a cell if it is more concentrated inside the cell than in the surroundings. In active transport, energy is required to move the substance against its concentration gradient. In facilitated diffusion, specific carrier proteins help the substance move into the cell down its concentration gradient.
Can facilitated diffusion be satureted?
Yes, facilitated diffusion can become saturated when all available transport proteins are in use and the rate of transport reaches its maximum capacity. This saturation point can be reached when the concentration of the substance being transported is high enough to exceed the transport protein's capacity.
What substance crosses the cell membrane by facilitated diffusion?
a sodium ion
What substance is most commonly transported during facilitated diffusion?
Glucose is one of the most commonly transported substances during facilitated diffusion. Facilitated diffusion is the process by which specific molecules, like glucose, are transported across cell membranes with the help of carrier proteins. These carrier proteins facilitate the movement of molecules down their concentration gradient without requiring energy input.
Movement of a substance down the substance's concentration gradient?
diffusion
Give 2 examples of passive transport?
Passive transport is when molecules pass freely through the membrane moving from the higher concentration area to the region of lower concentration. Three examples of this are diffusion, osmosis, and active transport.
