Water Movement and Solutions

The video tutorial covers osmosis and the plasma membrane, focusing on how water moves in and out of cells. It explains the setup of an experiment with a beaker and cell, detailing the solute and water concentrations. The tutorial discusses hypertonic, hypotonic, and isotonic solutions, illustrating how water flows in each scenario. It also teaches how to calculate missing solute and water percentages, emphasizing the importance of understanding these concepts for homeostasis.

What is the primary factor that controls the movement of water across the plasma membrane?

• Temperature

• Amount of solute

• Cell size

• Membrane thickness

In the experimental setup, if a cell has 90% water, what percentage of solute does it contain?

• 20%

• 15%

• 10%

• 5%

What happens to a cell in a hypertonic solution?

• It loses water and shrinks

• It gains water and swells

• It remains the same size

• It bursts

Why does water move out of a cell in a hypertonic solution?

• Because the cell is too small

• Because there is more solute outside the cell

• Because there is more solute inside the cell

• Because the cell is too large

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

• Water moves out of the cell

• Water does not move

• Water moves equally in and out

• Water moves into the cell

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

• The cell remains unchanged

• The cell swells

• The cell shrinks

• The cell bursts

What characterizes an isotonic solution?

• No solute present

• Equal solute concentration inside and outside the cell

• More solute outside the cell

• More solute inside the cell

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

• Water moves into the cell

• Water moves out of the cell

• Water moves in and out equally

• No net movement of water

If a solution has 15% solute, what percentage of water does it contain?

• 75%

• 80%

• 85%

• 90%

What happens to water movement when there is an equal amount of water on both sides of a membrane?

• Water moves into the cell

• Water moves out of the cell

• Water moves equally in and out

• Water does not move