Water Potential and Osmosis

Osmosis

Thursday 4th February 2021

Osmosis

• So, like diffusion, osmosis is a passive process where molecules move from high concentration to low concentration.

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• Osmosis is specific to water molecules and involves movement from HC to LC across a partially permeable membrane.

Osmosis

• A partially permeable membrane is a membrane which has small holes in which allow small molecules through but not larger molecules.

• A higher concentration of water is also referred to as a dilute solution.

• A concentrated solution will have a lower concentration of water.

Multiple Choice

TRUE OR FALSE? Osmosis can occur in gases or liquids.

• TRUE

• FALSE

Osmosis

• Water potential is a measure of the tendency of water molecules to diffuse (move) from one region to another.

Multiple Choice

Osmosis refers to the diffusion of water molecules from _____ to _____ concentration across a partially permeable membrane.

• low, high

• high, low

Multiple Choice

TRUE OR FALSE. Osmosis requires energy to occur.

• TRUE

• FALSE

Osmosis

• HYPOtonic - a solution that contains a HC of water.

• HYPERtonic - a solution that contains a LC of water.

• ISOtonic - a solution that has the same water concentration as the cell.

Multiple Choice

A partially permeable membrane allows what size molecules through?

• large

• small

• any size

• none