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In which direction does water move in a solution when there is a difference in osmotic pressure, from low to high?
In a solution with a difference in osmotic pressure, water moves from an area of low osmotic pressure to an area of high osmotic pressure.
Does Aquaporin channel activity require energy?
No, Aquaporin channel activity does not require energy because it allows for passive movement of water molecules across cell membranes driven by osmotic gradients.
The pressure needed to stop osmosis is called?
The osmotic pressure. This is the pressure which would have to be applied to a solution to stop water entering if it was separated from pure water by a semipermeable membrane.
How do net hydrostatic pressure and net osmotic pressure each change along the length of a capillary?
Net hydrostatic pressure decreases along the length of a capillary due to resistance and filtration of fluid out of the capillary. In contrast, net osmotic pressure remains relatively constant along the capillary length, as proteins and solutes that contribute to osmotic pressure do not leave the capillary as easily.
What is the most important plasma protein for the blood's colloid osmotic pressure?
The most important plasma protein for the blood's colloid osmotic pressure is albumin.
What does facilitated diffusion do in a cell?
It allows for the flow of substances which are normally too large to pass through the cell membrane. Like active transport, it accomplishes this using channel proteins coded for each specific substance (sugar, for example). Unlike active transport, facilitated diffusion only works WITH the osmotic pressure gradient, not against.
What must the turgor pressure equal if there is no net diffusion between the solution and the cell?
If there is no net diffusion between the solution and the cell, the turgor pressure inside the cell must equal the osmotic pressure of the surrounding solution. This balance prevents water from moving in or out of the cell, maintaining cell stability. Essentially, the forces exerted by the cell's internal pressure and the external osmotic pressure are in equilibrium.
What term refers to diffusion of water molecules through a selectively preamble membrane?
Osmosis is the diffusion of water molecules through a semi-permeable membrane to equalise osmotic pressure.
Blood flow through capillaries is controlled by?
Pressure. Capillaries are small so the force of blood coming from the heart is at greater pressure when it reaches the tiny capillaries. Pressure forces the diffusion of particles in and the osmotic diffusion of substances out (mainly metabolic wastes) to the veins.
What is the ability of a solution to do work by osmosis?
The ability of a solution to do work by osmosis is determined by its osmotic pressure, which is the pressure needed to stop the flow of solvent into the solution through a semipermeable membrane. Solutions with higher osmotic pressure can exert more force and do more work through osmosis.
In which direction does water move in a solution when there is a difference in osmotic pressure, from low to high?
In a solution with a difference in osmotic pressure, water moves from an area of low osmotic pressure to an area of high osmotic pressure.
What is the pressure for diffusion that is produced by the concentration gradient?
Osmotic Pressure. It exists anywhere that there is a soluble substance concentration gradient; that is, not only when a membrane separates substance concentrations. See: Brownian Motion.
What is diffusion pressure deficit?
Diffusion pressure deficit is the difference in water vapor pressure between two points in a plant that drives the movement of water through plant tissues. It is a critical factor in the movement of water from roots to leaves in plants.
What is the relationship between TDS and osmotic pressure?
TDS increases the osmotic pressure. From the formula, Osmotic pressure = CRT. C as the concentration in mol / L; R = gas constant; T = temperature. The higher the concentration of the solids, the higher is its osmotic pressure.
What does NOT influence the rate of diffusion of a chemical across a plasma membrane?
Besides the concentration of the chemical, the pore size of the plasma membrane, and the osmotic pressure of the cytoplasm - nothing else influences the rate of diffusion of a chemical across a plasma membrane.
What do plasma proteins that remain in the blood capillaries help?
Maintain the osmotic pressure of the blood
Calculate the osmotic pressure of 0.500 M sodium chloride at 25oC.?
The osmotic pressure is 24,44 at.
