Diffusion and Osmosis Movement Practice

Water is the only substance that can cross our cell membranes.

• True

• False

Active transport requires energy because...

• The cell is moving something against a concentration gradient
• The cell is moving something with a concentration gradient

In which case would a cell most likely shrink?

• when placed in a solution containing a high salt concentration
• when placed in a isotonic solution
• when placed in a solution containing distilled water which is 0% salt

A student noticed that placing wilted lettuce in a bowl of cool water caused the lettuce to become more crisp and firm. What is the best explanation for his observation?

• Water moved into the lettuce cells by active transport.
• Water moved into the lettuce cells by osmosis.
• Salt moved into the lettuce cells by diffusion.
• Water moved out of the lettuce cells by osmosis.

A SOLUTE is . . . .

• the dissolved particles that you dissolve

• the liquid where you dissolve stuff

• the combination of the particles and liquid

The SOLVENT is . . .

• the stuff you dissolve in liquid

• the combination of liquid and dissolved stuff

• the liquid where you dissolve stuff

This cell is in a _________ solution.

• Hypotonic
• Hypertonic
• Isotonic

Which way will the water molecules move during osmosis?

• Out of the cell, so the cell shrinks.
• Out of the cell, so the cell swells.
• Into the cell, so the cell shrinks.
• Into the cell, so the cell swells.

Which cell is placed into a hypotonic environment? 

• A
• B
• C
• D

Osmosis is specifically.....

• diffusion of water molecules through a semi-permeable membrane from an area of low water concentration to an area of high water concentration

• the diffusion of particles from an area of high concentration to an area of low concentration

• diffusion of water molecules through a semi-permeable membrane from an area of high water concentration to an area of low water concentration

• the diffusion of particles from an area of low concentration to an area of high concentration