Diffusion and Osmosis

Front

What is diffusion?

Back

Diffusion is the movement of particles from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically from high to low concentration.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, from low to high concentration, requiring energy.

Front

What is exocytosis?

Back

Exocytosis is the process by which a cell expels materials in vesicles that fuse with the cell membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which a cell engulfs substances from its environment, forming a vesicle.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell loses water and shrinks due to the higher concentration of solutes outside the cell.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, a cell gains water and may swell or burst due to the lower concentration of solutes outside the cell.

Front

What is an isotonic solution?

Back

An isotonic solution has the same concentration of solutes as the inside of the cell, resulting in no net movement of water.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.