Water Potential Extra Credit

What is the formula to calculate water potential?

• Ψ = Ψs + Ψp

• Ψ = Ψs x Ψp

• Ψ = Ψs - Ψp

• Ψ = Ψs / Ψp

• -7.5

• 7.5

• -1.5

• 1.5

Tags

NGSS.HS-LS2-4

• -4

• -7.5

• -3.5

• 3.5

Tags

NGSS.HS-LS2-4

What would the pressure potential be for a solution in an open container at sea level?

• 0

• 1

• 2

• infinite

Calculate the water potential of a solution with a solute potential of -2.5 bars and a pressure potential of 0.9 bars.

• -2.5 bars

• -1.6 bars

• -3.4 bars

• 0.9 bars

Why can plant cells create positive pressure potential within their cells while animal cells cannot?

• plant cells have chloroplasts which create pressure within the cell

• plant cells have cell walls that exert pressure as their large central vacuole fills up

• plant cells have a more robust cytoskeleton than animal cells

• plant cells cannot move so they must use pressure in order to compensate for this fact

What prevents a plant cell from bursting if it takes on too much water?

• Cell membrane

• Cell wall

• Cytoplasm

• Nucleus

Tags

NGSS.HS-LS1-3

What is the effect of solutes on a solution's overall water potential?

• Increases water potential

• Decreases water potential

• Has no effect on water potential

• Creates equilibrium

• Into the cell, because the cell has a higher water potential than the solution.

• Into the cell, because the cell has a lower water potential than the solution.

• Out of the cell, because the cell has a higher water potential than the solution.

• Out of the cell, because the cell has a lower water potential than the solution.