Osmosis and Tonicity

What is the importance of the cell's environment on its survival?

• It determines the color of the cell
• It has no impact on the cell
• It affects the movement of water across the cell membrane
• It only affects plant cells

What is the role of the cell membrane in the movement of molecules?

• Preventing all molecules from crossing
• Allowing some molecules to move freely in and out of the cell
• Only allowing water molecules to move in and out
• Acting as a barrier for all molecules

What happens to a cell placed in a hypotonic solution?

• It shrinks and wrinkles, and could possibly die
• It loses its cell wall
• It swells up and could burst
• It remains unchanged

What is the movement of molecules down their concentration gradients called?

• Facilitated diffusion
• Diffusion
• Active transport
• Osmosis

What is a solute?

• A substance that is selectively permeable
• A substance that is smaller than a solvent molecule
• A substance that cannot be dissolved in a solvent
• A substance that can be dissolved in a solvent like water

What is the term used to describe a solution with the same amount of solute molecules as the cell?

• Hypotonic
• Anionic
• Hypertonic
• Isotonic

What happens to a cell placed in a hypertonic solution?

• It swells up and could burst
• It remains unchanged
• It shrinks and wrinkles, and could possibly die
• It loses its cell wall

What is the net movement of water through a selectively permeable membrane from a low solute concentration to a high solute concentration called?

• Active transport
• Osmosis
• Diffusion
• Facilitated diffusion

What is the potential consequence of osmotic pressure in diseases like diabetes?

• Physiological complications
• Increased energy levels
• Decreased blood sugar levels
• Improved immune response

What causes crenation of red blood cells?

• No change in water movement
• Diffusion of water out of the cell
• Diffusion of water into the cell
• Cell division