Unit 3 Lesson 3 - Osmosis & Tonicity Practice

Front

What is osmosis?

Back

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

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing the cell to swell as water enters.

Front

Define hypertonic solution.

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing the cell to shrink as water exits.

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 happens to a cell in a hypotonic solution?

Back

The cell will swell and may burst due to the influx of water.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will shrink as water moves out of the cell.

Front

What happens to a cell in an isotonic solution?

Back

The cell will remain the same size as there is no net movement of water.

Front

What is tonicity?

Back

Tonicity refers to the ability of a surrounding solution to cause a cell to gain or lose water.

Front

How does osmosis differ from diffusion?

Back

Osmosis specifically refers to the movement of water, while diffusion refers to the movement of solutes.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others.