BackOsmosis quiz #3
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BackIn osmosis, what is the direction of water movement relative to solute concentration?
In osmosis, water moves from an area of lower solute concentration to an area of higher solute concentration. What is the correct description of the relationship between osmosis and diffusion?
Osmosis is a specific type of diffusion involving the movement of water across a semi-permeable membrane, while diffusion refers to the general movement of particles from high to low concentration. In which beaker will osmosis cause expansion of the dialysis tubing bag?
Osmosis will cause expansion of the dialysis tubing bag when the solution inside the bag is more concentrated (hypertonic) than the solution outside (hypotonic), causing water to move into the bag. Choose the arrow that shows the direction H+ will diffuse.
H+ ions will diffuse from an area of higher concentration to an area of lower concentration, following the concentration gradient. Which of the following statements about osmosis is correct?
Osmosis is the movement of water across a semi-permeable membrane from a region of lower solute concentration to a region of higher solute concentration. A cell exposed to a hypertonic environment will ______ by osmosis.
A cell exposed to a hypertonic environment will lose water and shrink by osmosis. Osmosis is best defined as the movement of:
Osmosis is best defined as the movement of water across a semi-permeable membrane from an area of lower solute concentration to an area of higher solute concentration. Which of the following is not required for osmosis to occur?
Osmosis does not require energy input (ATP); it is a passive process. What is osmotic pressure and how does it relate to osmosis?
Osmotic pressure is the counterforce required to stop the flow of solvent through a semipermeable membrane during osmosis. It increases as the difference in solute concentration across the membrane increases. What happens to a red blood cell placed in an isotonic solution, and why?
A red blood cell in an isotonic solution experiences no net movement of water because the solute concentrations inside and outside the cell are equal. This keeps the cell stable without swelling or shrinking. What happens to water movement through aquaporins in a hypertonic solution?
In a hypertonic solution, water flows out of the cell through aquaporins, moving from the area of lower solute concentration inside the cell to the higher solute concentration outside, causing the cell to shrink and dehydrate. What is the effect of placing Elodea cells in a hypertonic solution?
When Elodea cells are placed in a hypertonic solution, water exits the cells, causing them to shrink and potentially undergo plasmolysis due to dehydration. What happens to Elodea cells in a hypotonic solution?
In a hypotonic solution, water enters Elodea cells, causing them to swell and potentially burst if too much water accumulates. Which property of water is responsible for reducing edema through osmosis?
The ability of water to move across semipermeable membranes by osmosis, driven by concentration gradients, is responsible for reducing edema by moving excess water out of tissues. What is an example of an isotonic solution in biological systems?
An example of an isotonic solution is intravenous saline, which has the same solute concentration and osmotic pressure as blood plasma or tissue fluids. How is a hypertonic solution described in terms of solute concentration and osmotic pressure?
A hypertonic solution has a higher solute concentration and higher osmotic pressure compared to the fluid inside cells or bodily fluids. What is considered an isotonic solution in relation to bodily fluids?
An isotonic solution is one that has equal solute concentration and osmotic pressure as bodily fluids, resulting in no net movement of water into or out of cells.
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