Unit 3 Lesson 3 - Osmosis & Tonicity Practice

Front

What is osmosis?

Back

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

Front

Define hypertonic solution.

Back

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

Front

Define 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

Define 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 hypertonic solution?

Back

The cell will shrink as water moves out of the cell to balance the solute concentration.

Front

What happens to a cell in a hypotonic solution?

Back

The cell will swell and may burst as water moves into 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 a semipermeable membrane?

Back

A semipermeable membrane allows certain molecules, such as water, to pass through while blocking others.

Front

How does water move in osmosis?

Back

Water moves from an area of low solute concentration to an area of high solute concentration.

Front

What is the effect of osmosis on plant cells?

Back

In a hypotonic solution, plant cells become turgid (firm) due to water intake; in a hypertonic solution, they become plasmolyzed (shrunken).