Tonicity

Front

What is diffusion?

Back

Diffusion is the process by which molecules move from an area of high concentration to an area of low concentration.

Front

What is a hypertonic solution?

Back

A hypertonic solution is one that has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell.

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell.

Front

True or False: In simple diffusion, molecules move from high concentration to low concentration across a membrane.

Back

True

Front

What is the function of the cell membrane?

Back

The cell membrane is the protective outer layer that controls what enters and leaves the cell.

Front

What is osmosis?

Back

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

Front

What happens to a cell in a hypertonic solution?

Back

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

Front

What is the role of transport proteins in the cell membrane?

Back

Transport proteins help move substances across the cell membrane, either by facilitated diffusion or active transport.