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When there are different concentrations of a molecule on either side of the cell membrane a?
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When does diffusion occur across a cell membrane?
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
When there are different amounts of a substance on either side of the cell membrane what gradient results.?
It is known as a concentration gradient which in diffusion will always flow from areas of high concentration to areas of lower concentrations.
Why does the level of a more concentrated solution rise when two solutions of different concentrations are separated by a semipermeable membrane and when does it stop rising?
The more concentrated solution is hypertonic and osmotic pressure (a hydrostatic force whose sole purpose in life is to make concentrations equal) tends to move solvent into the more concentrated solution. It will stop rising when either a) the solution concentrations are the same on both sides of the membrane, or b) when the osmotic pressure becomes equal to the ambient air pressure.
How does a cell maintain differences in concentration of certain ions on either side of the plasma membrane?
Cells maintain unequal concentrations of ions on opposite sides of a cell membrane through active transport.
When there are different amounts of a substance on either side of the cell membrane an gradient results?
osmosis
Is diffusion passive transport?
When there is a solution on either side of a barrier (membrane for example) withing a cell, the concentrations of said solution will be different on either side of the barrier. Concentrations do not like to be different and will move from high to low until they are equal. For example, there are sodium ions on either side of a cell membrane. the concentration is higher inside, so to make the concentrations equal, some salt ions move through transmembrane proteins from the inside of the cell to the outside. it's called passive because it doesn't use any energy
What transport is diffusion?
When there is a solution on either side of a barrier (membrane for example) withing a cell, the concentrations of said solution will be different on either side of the barrier. Concentrations do not like to be different and will move from high to low until they are equal. For example, there are sodium ions on either side of a cell membrane. the concentration is higher inside, so to make the concentrations equal, some salt ions move through transmembrane proteins from the inside of the cell to the outside. it's called passive because it doesn't use any energy
What is osmosis controlled by?
Osmosis is controlled by the permeability of the osmotic membrane and the equilibrium of the solutions on either side of the membrane. If the solutions have unequal concentrations or osmotic pressures, and the molecules in the solution can pass through the membrane, then the solutions will mix until both sides have equal concentrations. If the membrane is impermeable, then nothing will happen.
Why are ion channels needed?
To alter the concentrations of various types of ions on either side of a cell membrane.
When does diffusion occur across a cell membrane?
Diffusion across a cell membrane occurs when concentrations of a substance are higher either inside or outside the cell.
When there are different amounts of substance on either side of the cell membrane a what gradient results?
It is known as a concentration gradient which in diffusion will always flow from areas of high concentration to areas of lower concentrations.
When there are different amounts of a substance on either side of the cell membrane a what gradient results.?
It is known as a concentration gradient which in diffusion will always flow from areas of high concentration to areas of lower concentrations.
When there are different amounts of a substance on either side of the cell membrane what gradient results.?
It is known as a concentration gradient which in diffusion will always flow from areas of high concentration to areas of lower concentrations.
How does water move in osmosis?
Osmosis moves a solvent (eg water) to balance the concentrations of solute either side of a semipermeable membrane. The solvent is not lost.If the concentration of a solution is higher on one side of the membrane than the other, then the water moves across the membrane from the less concentrated side to the more concentrated side to dilute it until the concentrations on either side are equal.
Why does the level of a more concentrated solution rise when two solutions of different concentrations are separated by a semipermeable membrane and when does it stop rising?
The more concentrated solution is hypertonic and osmotic pressure (a hydrostatic force whose sole purpose in life is to make concentrations equal) tends to move solvent into the more concentrated solution. It will stop rising when either a) the solution concentrations are the same on both sides of the membrane, or b) when the osmotic pressure becomes equal to the ambient air pressure.
Under what condition would a molecule need to be actively transport across a membrane?
A molecule would be actively transported when an equal concentration of solutes exist on either side of the cell membrane.
What does osmosis do in a cell?
the tendency of a fluid, usually water, to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane.
