Unit 2: Cellular Transport

 Which of the following is not an example of osmosis?

• Salt on a slug causes it to dry out
• Soaking dehydrated fruits and vegetables in water to restore
• After soaking in the bath too long your fingers get pruned
• Smelling perfume from someone in the classroom

Which of these separate the inside of the cell from the cell's environment?

• cell membrane
• cytoplasm
• mitochondia
• nucleus

Elodea is a freshwater plant. What happens if you expose it to saltwater?

• Water will enter the plant cell to reach equilibrium.
• Salt will enter the plant cell to achieve equilibrium.
• Salt will leave the plant cell to achieve equilibrium.
• Water will exit the plant cell to achieve equilibrium

Which is NOT a type of passive transport?

• diffusion
• facilitated diffusion
• phagocytosis
• osmosis

Which way does a substance move in the concentration gradient during active transport?

• high to low
• low to high
• no net movement

How does the size of the molecule affect transport across the plasma membrane?

• Small molecules diffuse across the plasma membrane 
• Size does not affect transport across the plasma membrane
• Large molecules diffuse across the membrane more easily.

In facilitated diffusion, which direction does the solute move?

• up the concentration gradient
• down the concentration gradient
• no net movement in the gradient
• water moves down the gradient

What is transported by osmosis?

• oxygen
• carbon dioxide
• water
• ATP

Which best describes exocytosis in cell transport?

• Exocytosis moves substances out of the cell
• Exocytosis moves substances into the cell
• Exocytosis moves substances down the concentration gradient
• Exocytosis uses transport proteins to move substances

Suppose a plant absorbs water through the soil. What kind of transport is this?

• pinocytosis
• osmosis
• diffusion
• facilitated diffusion