Mathes Water Potential Quiz

What is water potential?

• Water potential is the measure of the amount of water in a given area.

• Water potential is the ability of water to flow through a membrane.

• Water potential is the pressure exerted by water on its surroundings.

• Water potential is the potential energy of water per unit volume relative to pure water in reference conditions.

Define osmosis.

• The movement of solvent molecules from an area of lower solute concentration to an area of lower solute concentration through a semipermeable membrane.

• The movement of solute molecules from an area of lower solvent concentration to an area of higher solvent concentration through a semipermeable membrane.

• The movement of solvent molecules from an area of lower solute concentration to an area of higher solute concentration through a semipermeable membrane.

• The movement of solvent molecules from an area of higher solute concentration to an area of lower solute concentration through a semipermeable membrane.

Explain the process of diffusion.

• Diffusion is the movement of molecules through a semi-permeable membrane.

• Diffusion is the movement of molecules from an area of lower concentration to an area of higher concentration.

• Diffusion is the movement of molecules caused by gravity.

• Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

What is turgor pressure?

• The pressure exerted by the fluid inside the cell against its cell wall.

• The pressure exerted by the mitochondria inside the cell.

• The pressure exerted by the nucleus inside the cell.

• The pressure exerted by the fluid outside the cell against its cell wall.

Tags

NGSS.MS-LS1-2

How does turgor pressure affect plant cells?

• Turgor pressure has no effect on plant cells

• Turgor pressure causes plant cells to expand indefinitely

• Turgor pressure causes plant cells to shrink

• Turgor pressure affects plant cells by maintaining their shape and rigidity when the cell is fully hydrated, and causing them to wilt when the cell loses water.

Tags

NGSS.HS-LS1-3

What is a water potential gradient?

• The process of water evaporating from a surface.

• The measurement of the amount of water in a system.

• The difference in water potential between two points in a system.

• The movement of water from an area of low water potential to an area of high water potential.

How does solute potential affect water potential?

• Decreases water potential

• Causes water potential to fluctuate

• Has no effect on water potential

• Increases water potential

What is the formula to calculate water potential?

• Ψ = Ψs - Ψp - Ψg

• Ψ = Ψs + Ψp + Ψg

• Ψ = Ψs * Ψp * Ψg

• Ψ = Ψs / Ψp / Ψg

Describe the role of water potential in plant cells.

• Water potential regulates water movement and cell turgidity in plant cells.

• Water potential only affects water movement in animal cells.

• Water potential has no role in plant cells.

• Water potential is only important for maintaining cell shape in plant cells.

Tags

NGSS.HS-LS1-3

How does water potential affect the movement of water in plants?

• Water potential has no effect on the movement of water in plants.

• Water potential determines the direction and rate of water flow in plants through osmosis.

• Water potential causes water to move against the concentration gradient in plants.

• Water potential only affects the movement of water in animals, not plants.