Cellular Responses to Solutions

The video tutorial explains the effects of different solutions on cells, focusing on hypotonic, isotonic, and hypertonic environments. It describes how water molecules move across a semi-permeable membrane, leading to net inflow or outflow of water, depending on the solute concentration. In a hypotonic solution, water enters the cell, causing it to expand. In an isotonic solution, there is no net water movement, maintaining equilibrium. In a hypertonic solution, water exits the cell, causing it to shrink. The tutorial uses visual aids to illustrate these concepts.

What is the primary characteristic of a semi-permeable membrane?

• It allows all molecules to pass through.

• It allows only solute particles to pass through.

• It allows only water molecules to pass through.

• It blocks all molecules from passing through.

In a hypotonic solution, what happens to the water molecules?

• They remain static.

• They move into the cell.

• They move in equal amounts in and out of the cell.

• They move out of the cell.

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

• The cell expands and may burst.

• The cell shrinks.

• The cell remains the same size.

• The cell becomes rigid.

In an isotonic solution, what is the net movement of water molecules?

• Water moves into the cell.

• There is no net movement of water.

• Water moves in a circular pattern.

• Water moves out of the cell.

What does the prefix 'iso' in isotonic refer to?

• More

• Different

• Less

• Equal

In a hypertonic solution, what is the direction of water movement?

• Water does not move.

• Water moves in both directions equally.

• Water moves out of the cell.

• Water moves into the cell.

What is the likely outcome for a cell in a hypertonic solution?

• The cell expands.

• The cell remains unchanged.

• The cell shrinks.

• The cell becomes more permeable.

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

• It becomes more rigid.

• It expands and may burst.

• It remains the same.

• It shrinks.

How does a red blood cell appear in an isotonic solution?

• Rigid

• Over-inflated

• Normal with a divot

• Shriveled

What is the appearance of a red blood cell in a hypertonic solution?

• Shriveled

• Rigid

• Over-inflated

• Normal with a divot