Water.
Active Transport - the process of moving particles across a cell membrane against a concentration gradient <- right one
The concentration of the water determines the rate of diffusion. A higher concentration of water will be transported to an area with a lower concentration, via the concentration gradient. In a high salt solution, the concentration of the water is higher in the cell, and so the water is diffused through the cells semi-permeable membrane into the high salt solution, to try to stabilise the concentration differential.
Active transport is used when molecules are moved across a cell membrane against their concentration gradient, from a low to a high concentration.
protein molecules in the cell membrane
Osmosis is the movement of water from a solution of high concentration to a solution of lower concentration through a membrane. Water passes through the membrane, diluting the solution of higher concentration on the other side, until both solutions on either side of the membrane have equal concentrations.
a cell transports things across the cell membrane from areas of high concentration to ares of low concentration
The cell membrane is selectively permeable, allowing certain substances to pass through via diffusion or osmosis. In diffusion, molecules move from an area of high concentration to low concentration directly through the membrane. In osmosis, water moves through the membrane from an area of low solute concentration to an area of high solute concentration.
During osmosis, water molecules move across a cell membrane from an area of low solute concentration to an area of high solute concentration in order to balance the concentration of solutes on both sides of the membrane. Diffusion involves the movement of molecules from an area of high concentration to an area of low concentration across the cell membrane until equilibrium is reached. Both processes are passive and do not require energy input from the cell.
Without a cell membrane involved, this is just simple diffusion. If a cell membrane is involved, it is osmosis.
Active Transport - the process of moving particles across a cell membrane against a concentration gradient <- right one
Active Transport - the process of moving particles across a cell membrane against a concentration gradient <- right one
Without a cell membrane involved, this is just simple diffusion. If a cell membrane is involved, it is osmosis.
Water, from high to low concentration.
The concentration of the water determines the rate of diffusion. A higher concentration of water will be transported to an area with a lower concentration, via the concentration gradient. In a high salt solution, the concentration of the water is higher in the cell, and so the water is diffused through the cells semi-permeable membrane into the high salt solution, to try to stabilise the concentration differential.
Passive transport moves substances across a cell membrane in the direction of their concentration gradient without requiring energy input from the cell. This process relies on the natural movement of molecules from areas of high concentration to areas of low concentration, facilitated by protein channels or carriers in the cell membrane.
Osmosisdiffusion deals with anything moving from high to low concentrations while osmosis is specifically water
The sodium-potassium pump establishes and maintains concentration gradients of sodium and potassium ions across the cell membrane. It actively pumps sodium out of the cell and potassium into the cell, creating a higher concentration of sodium outside the cell and a higher concentration of potassium inside the cell. This helps maintain the cell's resting membrane potential and is essential for various cellular functions.