DIFFUSION THROUGH A CELL MEMBRANE
The rate of diffusion depends on the difference between concentrations across the host material, with higher concentration differences resulting. Concentration Gradient. The difference of a concentration of solutes in a single solution between two regions. Diffusion. The process by which molecules move. Covers diffusion - a type of passive transport. Diffusion will continue until the concentration gradient has been eliminated. Since diffusion What is the main difference between simple diffusion and facilitated diffusion?.
What is the relationship between diffusion and concentration gradient?
They're just all randomly bouncing around and when you're in the starting position, when you're exactly like this, there's no probability because of a yellow particle moving from left to right, because there aren't any yellow particles here. While there's a probability that some of these particles, in a certain amount of time, some of these yellow particles could move from right to left.
And so they'll keep doing that until you get to a stable configuration where now you have an equal probability of things moving from left to right, and right to left. And that's going to be true for each of these particles.
Diffusion ( Read ) | Biology | CK Foundation
So the real takeaway, you'll hear in a biology or a chemistry class, of things moving down their concentration gradient, and you might say, and their unique concentration gradient. As you see, the yellow particles' concentration gradient goes in the other direction as the purple particles, but there's no magic to this.
You just have to imagine a bunch of things just bouncing around in a bunch of different directions, and then what would just naturally happen? You would naturally have a higher probability of moving from high concentration to low concentration, than from low concentration to high concentration.
At low concentrations, molecules pass through the carrier proteins in a way similar to that of simple diffusion. At high solute concentrations, however, all the proteins are occupied with the diffusing molecules. Increasing the solute concentration further will not change the rate of diffusion.
In other words, there is some maximum rate of diffusion Vmax when all the carrier pro teins are saturated. Therefore, we can not use a simple linear equation to describe the rate of diffusion.
How is a concentration gradient related to the process of diffusion? | Socratic
The rate of diffusion will increase with increasing solute concentration, but must asymptotically approach the saturation rate, Vmax. K and Vmax depend on properties of the diffusing molecule, such as its permeability Pas well as the surface area A of the cell, but for simplification we give the equation as: By graphing this equation, we see that at low concentrations of solute, the rate of diffusion into a cell occurs almost linearly, like simple diffusion.
Temperature Of all the factors that influence diffusion rate, temperature is the most important. Temperature has the greatest effect on diffusion rates and is the easiest of the factors to change.
Increasing the temperature increases the diffusion rate by adding energy to each particle. This is because particles with more energy bounce against each other more frequently and spread evenly throughout the material volume.
Similarly, lowering the temperature will lower the diffusion rate by lowering the energy of each particle.Down a Concentration Gradient
Concentration Difference The rate of diffusion depends on the difference between concentrations across the host material, with higher concentration differences resulting in higher diffusion rates. For example, diffusion through a thin wall or membrane will occur quickly if there is a high concentration of the gas on one side and none of the gas on the other side of the wall.