Common mistakes and misconceptions. In osmosis, water moves from areas of
low concentration of solute to areas of high concentration of solute
.
What moves from high to low concentration?
Diffusion
. Diffusion is a process of passive transport
Does osmosis move from high to low concentration?
Both diffusion and osmosis are passive transport processes, which means they do not require any input of extra energy to occur. In both diffusion and osmosis, particles
move from an area of higher concentration to one of lower concentration
.
What happens if osmotic pressure is high?
(c) When cells are placed in a concentrated salt solution with an osmotic pressure greater than that of the intracellular fluid,
the rate of flow of water out of the cells is greater than the rate of flow into the cells
. The cells shrivel and become so deformed that they cannot function.
Why does concentration go from high to low?
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. Because of
the passive movement of particles no chemical energy is spent as it takes place
.
Does hypertonic shrink or swell?
A hypotonic solution causes a cell to swell, whereas a
hypertonic solution causes a cell to shrink
.
What determines the osmotic pressure of any given solution?
The concentration of solute particles
determines the osmotic pressure of a solution.
What is the body's response to a rise in blood plasma osmotic pressure?
Oncotic pressure, or colloid osmotic-pressure, is a form of osmotic pressure induced by the proteins, notably albumin, in a blood vessel's plasma (blood/liquid) that displaces water molecules, thus creating
a relative water molecule deficit
with water molecules moving back into the circulatory system within the lower …
Is high to low concentration active or passive?
Active transport moves materials from lower to a higher concentration, while
passive
transport moves materials from higher to lower concentration.
Is osmosis active or passive?
Osmosis is a
passive form
of transport that results in equilibrium, but diffusion is an active form of transport. 2. Osmosis only occurs when a semi-permeable membrane is present, but diffusion can happen whether or not it is present.
Is simple diffusion high to low concentration?
In simple diffusion, small noncharged molecules or lipid soluble molecules pass between the phospholipids to enter or leave the cell, moving from areas of
high concentration
to areas of low concentration (they move down their concentration gradient).
How do you tell if a cell will shrink or swell?
If
a cell is placed in a hypertonic solution
, water will leave the cell, and the cell will shrink. In an isotonic environment, there is no net water movement, so there is no change in the size of the cell. When a cell is placed in a hypotonic environment, water will enter the cell, and the cell will swell.
Does hypertonic make things swell?
Hypertonic solutions have
less water
( and more solute such as salt or sugar ) than a cell. Seawater is hypertonic. … Plant cells have a cell wall around the outside than stops them from bursting, so a plant cell will swell up in a hypotonic solution, but will not burst.
Does hypertonic move in or out?
Tonicity of solution Solute concentration Water moves… | Hypertonic Higher solute in solution than in cell Out of the cell | Isotonic Equal amounts of solute in cell and solution Into and out of cell at the same time | Hypotonic Lower solute in solution than in cell Into the cell |
---|
What happens to osmotic pressure when the concentration of solute is decreased?
The volume on the side with the
solute increases until the number of water molecules
on both sides is equal. Increasing the concentration of solute reduces the space available for water molecules, which reduces their numbers.
What is the relationship of osmotic pressure and the concentration of solution?
The osmotic pressure of a solution is the pressure difference needed to stop the flow of solvent across a semipermeable membrane. The osmotic pressure of a solution is
proportional to the molar concentration of the solute particles in solution
.