Understanding Osmosis and Related Concepts

What is the main difference between passive and active transport across the cell membrane?

• Both passive and active transport require energy.

• Passive transport moves substances along the concentration gradient, while active transport moves them against it.

• Active transport moves substances along the concentration gradient, while passive transport moves them against it.

• Passive transport requires energy, while active transport does not.

In osmosis, which direction does water move across a semi-permeable membrane?

• From lower solvent concentration to higher solvent concentration.

• From higher solute concentration to lower solute concentration.

• From higher solvent concentration to lower solvent concentration.

• From lower solute concentration to higher solute concentration.

What is osmotic pressure?

• The pressure required to stop the movement of solvent across a membrane.

• The pressure required to stop the movement of solute across a membrane.

• The pressure that causes solvent to move from low to high concentration.

• The pressure that causes solute to move from high to low concentration.

How is osmolarity different from osmolality?

• Osmolarity is measured in moles per kilogram, while osmolality is measured in moles per liter.

• Osmolarity is measured in osmoles per liter, while osmolality is measured in osmoles per kilogram.

• Osmolarity includes only non-dissociating solutes, while osmolality includes all solutes.

• Osmolarity is a measure of solute concentration, while osmolality is a measure of solvent concentration.

What is an ineffective osmole?

• A solute that cannot cross the membrane.

• A solute that can easily cross the membrane.

• A solute that does not contribute to osmotic pressure.

• A solute that increases the osmotic gradient.

What does tonicity measure?

• The ability of a solution to change the volume of a cell.

• The ability of solutes to cross a membrane.

• The total solute concentration in a solution.

• The total solvent concentration in a solution.

What happens to a cell in an isotonic solution?

• The cell bursts.

• The cell swells.

• The cell shrinks.

• The cell size remains the same.

In a hypotonic solution, what happens to the cell?

• The cell shrinks.

• The cell swells.

• The cell size remains the same.

• The cell bursts.

What is the effect of a hypertonic solution on a cell?

• The cell bursts.

• The cell shrinks.

• The cell swells.

• The cell size remains the same.

What is the ultimate goal of osmosis in terms of solute concentration?

• To create a concentration gradient.

• To decrease solute concentration outside the cell.

• To achieve equilibrium between solute concentrations.

• To increase solute concentration inside the cell.