Principles of Diffusion and Osmosis Quiz

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Osmosis is the passive movement of water molecules across a selectively permeable membrane from an area of higher water concentration to an area of lower water concentration.

The concentration gradient, or difference in solute concentration, serves as the driving force for both diffusion and osmosis.

In a hypertonic solution, the solute concentration is higher than that of another solution.

The density of the solvent is not a factor influencing the rate of diffusion.

Factors such as concentration gradient, temperature, and molecular size collectively affect the rate of diffusion.

Osmotic pressure is crucial for maintaining the shape and integrity of cells by balancing water movement.

Facilitated diffusion is the passive movement of molecules across a membrane with the aid of carrier proteins, following the concentration gradient.

Smaller molecules exhibit faster diffusion rates compared to larger molecules.

In biological systems, osmosis can be observed when water moves into cells from regions of higher extracellular fluid concentration.

While both involve the movement of molecules, osmosis specifically involves water and requires a semipermeable membrane.

Reverse osmosis involves forcing water through a semipermeable membrane against its natural concentration gradient.

Elevated temperatures generally result in increased molecular movement, consequently enhancing the rate of diffusion.

In plants, osmosis occurs when water moves into root cells from the surrounding soil with a higher water concentration.

Osmotic pressure is the pressure needed to prevent the net flow of water across a semipermeable membrane.