Osmosis and diffusion

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a semi-permeable membrane.

Front

What is diffusion?

Back

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

Front

What does semi-permeable mean?

Back

Semi-permeable means that a membrane allows certain molecules to pass through while blocking others.

Front

What happens to a cell in a hypertonic solution?

Back

Water will flow out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

Water will flow into the cell, causing it to swell and potentially burst.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell.

Front

What is a concentration gradient?

Back

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

Front

What is the process of active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a membrane without the use of energy.

Front

What is an example of diffusion in everyday life?

Back

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