AP Biology Water Potential

Front

What is an isotonic solution?

Back

An isotonic solution has an equal concentration of solute compared to the inside of a cell.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration.

Tags

NGSS.HS-LS2-3

NGSS.HS-LS2-5

Front

What happens to a cell in a hypertonic solution?

Back

An animal cell placed in a hypertonic (salty) solution will shrink.

Tags

NGSS.HS-LS1-3

Front

What is water potential?

Back

Water potential ( Ψ ) is a measure of the potential energy in water, influencing the direction of water movement.

Front

What is the formula for calculating water potential?

Back

Water potential ( Ψ ) = Solute potential ( Ψ s ) + Pressure potential ( Ψ p ).

Front

What is solute potential?

Back

Solute potential ( Ψ s ) is the effect of solute concentration on the overall water potential.

Front

How does pressure potential affect water movement?

Back

Pressure potential ( Ψ p ) is the physical pressure on a solution, which can influence water movement into or out of a cell.

Front

What is the water potential of pure water at standard conditions?

Back

The water potential of pure water at standard conditions is 0 bars.

Front

If a cell has a water potential of -1.5 bars and is placed in a solution with a water potential of 1.5 bars, what is the net flow of water?

Back

There will be no net flow of water.

Front

What is the water potential of a 0.1 M sucrose solution at 20°C?

Back

The water potential of a 0.1 M sucrose solution at 20°C is approximately -2.43 bars.