Diffusion & Osmosis

Which of the following are examples of diffusion in everyday life?

• Smell of perfume across the room

• Placing a teabag in a glass of water

• Red ink on a shirt

• Water droplets on a cold surface

Which of the following are examples of diffusion in living organisms?

• Entry of oxygen and glucose into cells

• Entry of carbon dioxide through the stomata during photosynthesis

• Release of carbon dioxide through the stomata during respiration

Diffusion is the ________ movement of molecules from a region of _________________ concentration to a region of _________________ concentration.

• net; lower; higher

• net; higher; lower

• combined; lower; higher

• combined; higher; lower

Diffusion can occur with or without a partially permeable membrane.

• True

• False

What is the property(characteristic) of the cell surface membrane?

• fully permeable

• partially permeable

• semi permeable

• selective permeable

Look at the set-up below. What will you see after 30 minutes?

• The iodine solution outside the Visking tubing turns blue black.

• The starch solution turns blue black.

• Both the iodine and starch solution turns blue black.

Osmosis is the ________ movement of ___________ molecules from a region of _________________ water potential to a region of __________________ water potential.

• combined; water; higher; lower

• combined; air; higher; lower

• net; water; higher; lower

• net; air; higher; lower

Which has the highest water potential?

• concentrated salt solution

• dilute salt solution

• water

Which has the lowest water potential?

• concentrated sugar solution

• dilute sugar solution

• water

What will happen to the level of the liquid in the Visking tubing after 30 minutes?

• The level rises.

• The level drops.

• The level remains the same.