Osmosis and Solution Concentrations

The video tutorial covers the concepts of tonicity and osmosis, focusing on how water moves across membranes in response to solute concentration differences. It explains the effects of osmosis on water balance using a U-shaped tube example and discusses the impact of hypertonic, hypotonic, and isotonic solutions on red blood cells. The video concludes with a review of key points and information about additional resources for further learning.

What happens to water molecules in a U-shaped tube when one side has a higher concentration of solute?

• Water evaporates.

• Water remains stationary.

• Water moves towards the side with higher solute concentration.

• Water moves towards the side with lower solute concentration.

At equilibrium in osmosis, what is true about the movement of water molecules?

• Water stops moving completely.

• Water moves in one direction only.

• Water moves at equal rates in both directions.

• Water moves faster towards the side with more solute.

What is the effect on a red blood cell when placed in a hypertonic solution?

• The cell remains unchanged.

• The cell shrivels.

• The cell swells and bursts.

• The cell becomes isotonic.

In a hypertonic solution, how is the solute concentration outside the red blood cell compared to inside?

• Higher outside than inside.

• Lower outside than inside.

• There is no solute outside.

• Equal on both sides.

What happens to a red blood cell in a hypotonic solution?

• The cell swells and may burst.

• The cell becomes isotonic.

• The cell remains unchanged.

• The cell shrivels.

In a hypotonic solution, how is the solute concentration inside the red blood cell compared to outside?

• There is no solute inside.

• Equal on both sides.

• Lower inside than outside.

• Higher inside than outside.

What is the characteristic of an isotonic solution regarding solute concentration?

• Lower solute concentration inside the cell.

• Higher solute concentration inside the cell.

• Equal solute concentration inside and outside the cell.

• No solute present.

In an isotonic solution, what happens to the size of the red blood cell?

• The cell bursts.

• The cell remains the same size.

• The cell shrivels.

• The cell swells.

What is the main factor that determines the movement of water in osmosis?

• Temperature of the solution.

• Concentration of solute.

• Size of the container.

• Color of the solution.

Which of the following terms is used to describe solutions with equal solute concentrations?

• Atonic

• Hypertonic

• Hypotonic

• Isotonic