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What is the energy-requiring process that moves molecules and ions across a cell membrane against a concentration difference is clled what?
Wiki User
∙ 7y ago
active transport
Wiki User
∙ 7y ago
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How do small molecules get through the cell membrane against a concentration?
How do small molecules get through a cell membrane
What will molecules do when the concentration of molecules on both sides of a membrane are the same?
They will do nothing.
When the concentration on molecules on both sides on the membrane the molecules will?
Osmosis only occurs when the concentration of solutions are different when separated by a membrane. If both solutions are of the same concentration, Osmosis will not occur, so there will be no change.
Which term refers to the diffusion of water molecules through a slestively permaeable membrane?
The movement of water through a selectively permeable membrane is called diffusion. Water will always diffuse down a concentration gradient, from high solute concentration to low solute concentration.
If the concentrationof molecules on both sides of a membrane is the same the molecules will?
When the concentration of molecules on both sides of a semi permeable membrane are the same, there is no concentration gradient. Therefore, the system is at a state of equilibrium and the molecules remain static
The energy-requiring process that moves molecules and ions across a cell membrane against a concentration difference is called?
Active transportation
Which feature of a cell membrane determines whether molecules can cross the membrane?
They must either be lipid soluble (e.g. steroids) or very small (e.g. ions).
What is osomsis and difusion?
Osmosis is the tendency of a solvent to travel across a semipermeable membrane (Semipermeable membrane- a membrane that allows some molecules to pass through but does not allow other molecules to pass through) into areas of higher solute concentration. Diffusion is the random motion of molecules from an area of high concentration to an area of low concentration.
When the molecules on both sides of a cell membrane are in equilibrium what will the molecules do?
If the concentration of molecules on both sides of a membrane is the same, nothing will happen to the molecules. Osmosis only occurs when there is an imbalance of the molecules across the cell membrane.
Can diffusion occur without membrane?
Diffusion is the movement of molecules kineticly from an area of high concentration to an area of low concentration until they are evenly distributed. Osmosis is the movement of molecules thru a membrane.
When the concentration of molecules on both sides of the membrane is the same the molecules will?
reach dynamic equilibrium. Answer : move across the membrane in both directions (equilibrium).
What happens in a cell transportation lab report?
When a cell membrane is said to be selectively permeable, it means that the cell membrane controls what substances pass in and out through the membrane. This characteristic of cell membranes plays a great role in passive transport. Passive transport is the movement of substances across the cell membrane without any input of energy by the cell. The energy for passive transport comes entirely from kinetic energy that the molecules have. The simplest type of passive transport is diffusion, which is the movement of molecules from an area of high concentration to an area of lower concentration. Diffusion moves down the concentration gradient, which is the difference in the concentration of molecules across a space. Osmosis is a type of diffusion in which water molecules move down the concentration gradient. When the concentration of solute molecules outside the cell is lower than the concentration of solute in the cytosol , the solution outside is hypotonic to the cytosol. If the concentration of solute molecules is higher outside of the cell, the solution outside is said to be hypertonic. The solution outside is isotonic if the concentration is equal on both sides of the cell membrane.
