Table of Contents
- 1 What is the process by which molecules move from a high concentration gradient to a low concentration gradient?
- 2 What is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein?
- 3 When do molecules tend to move down a gradient?
- 4 What does a constant concentration of molecules look like?
What is the process by which molecules move from a high concentration gradient to a low concentration gradient?
Diffusion
Diffusion. Diffusion is a passive process of transport. A single substance tends to move from an area of high concentration to an area of low concentration until the concentration is equal across a space. You are familiar with diffusion of substances through the air.
What is it called when molecules move along down a concentration gradient?
Simple diffusion is pretty much exactly what it sounds like – molecules move down their gradients through the membrane. Molecules that practice simple diffusion must be small and nonpolar*, in order to pass through the membrane. Simple diffusion can be disrupted if the diffusion distance is increased.
When molecules move with the concentration gradient it means they are moving from to concentration?
In biological systems, there are two major transport phenomena: passive transport and active transport. In passive transport, particles (e.g. ions or molecules) are transported along the concentration gradient. This means that the particles move from areas of high concentrations to areas of low concentrations.
What is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein?
One example of passive transport is diffusion, when molecules move from an area of high concentration (large amount) to an area of low concentration (low amount). In simple diffusion, molecules that are small and uncharged can freely diffuse across a cell membrane. They simply flow through the cell membrane.
When molecules move from an area of high concentration to low concentration?
This spread of particles through random motion from an area of high concentration to an area of lower concentration is known as diffusion. This unequal distribution of molecules is called a concentration gradient.
Does diffusion move from high to low concentration?
Diffusion and osmosis are both passive transport processes that act to equalize the concentration of a solution. In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached.
When do molecules tend to move down a gradient?
Created by blahh_mi Terms in this set (38) the substance that dissolves to make a solution is called the solute during diffusion molecules tend to move down the gradient when the concentration of solute inside & outside a cell is the same, the cell has reached dynamic equilibrium
When does a bacterium move up a concentration gradient?
When a bacterium is looking for a particular chemical signal, it detects this chemical as it moves along its path. If it is moving up the concentration gradient, it will start detecting the chemical’s molecules more and more frequently.
What happens when the concentration gradient goes down?
If it is moving down the concentration gradient, it will start detecting the chemical’s molecules less and less frequently. This ultimately determines the direction and strength of the bias in its random walk.
What does a constant concentration of molecules look like?
If we picture each individual molecule as a little blue dot, a constant concentration of molecules (no gradient) would look like the picture below: A concentration gradient, with a higher concentration of molecules on the right than on the left would look like the picture below: