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 movement of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What does permeable mean?

Back

Permeable means that substances can pass through a material or membrane.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, a cell will shrink because water moves out of the cell.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, a cell will expand and may burst because water moves into the cell.

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is the same inside and outside the cell, resulting in no net movement of water.

Front

What is the role of the cell membrane in osmosis?

Back

The cell membrane is selectively permeable, allowing water to pass through while controlling the movement of solutes.

Front

Give an example of diffusion in everyday life.

Back

An example of diffusion is the smell of perfume spreading in a room.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy.

Front

What is concentration gradient?

Back

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