S25 BIO - Unit 2 Checkpoint Passive Transport

What is the process called when water moves across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration?

• Simple diffusion

• Facilitated diffusion

• Osmosis

• Active transport

Which type of transport does not require energy?

• Active transport

• Passive transport

• Endocytosis

• Exocytosis

In the potato diffusion lab, if the potato gained mass (weight), what type of solution was it likely placed in?

• Hypertonic

• Hypotonic

• Isotonic

• Supersonic

Which of the following is an example of facilitated diffusion?

• Oxygen moving through the cell membrane

• Glucose entering a cell through a protein channel

• Water moving through aquaporins

• Sodium ions being pumped out of a cell

What happens to a cell placed in a hypertonic solution?

• It swells

• It shrinks

• It stays the same

• It bursts

Tags

NGSS.HS-LS1-3

Why doesn't a cell placed in an isotonic solution change in size?

• Water moves in and out at the same rate

• Water only moves out of the cell

• Water only moves into the cell

• No water movement occurs

Which of the following best describes simple diffusion?

• Movement of molecules against a concentration gradient

• Movement of molecules through a protein channel

• Movement of molecules from high to low concentration without energy

• Movement of water through a semipermeable membrane

A cell is placed in a solution and it neither gains nor loses water. What is the tonicity of the solution?

• Hypertonic

• Hypotonic

• Isotonic

• Supersonic

Why is facilitated diffusion necessary for some molecules to enter a cell?

• They are too large to pass through the membrane directly

• They are nonpolar and can pass through easily

• They require energy to move

• They are water molecules

What will happen to a potato slice placed in a hypertonic solution?

• It will swell because water enters the cells

• It will shrink because water leaves the cells

• It will stay the same because no water movement occurs

• It will dissolve in the solution