Question

what factor does not affect diffusion rate? *
temperature
pressure
concentration
ion pump

what solution will make a cell swell? *
hypotonic
isotonic
hypertonic

what solution will make a cell shrink? *
hypotonic
isotonic
hypertonic

Explanation:

First Question:

• Temperature affects diffusion (higher temp → faster diffusion).
• Pressure can impact diffusion (e.g., gas diffusion).
• Concentration gradient drives diffusion.
• Ion pumps are for active transport, not diffusion (diffusion is passive). So Ion Pump does not affect diffusion rate.

• Hypotonic solution has lower solute concentration than cell. Water enters cell (osmosis), making it swell.
• Isotonic: equal solute, no net water movement.
• Hypertonic: higher solute, cell loses water.

• Hypertonic solution has higher solute concentration than cell. Water leaves cell (osmosis), causing it to shrink.
• Hypotonic: cell swells.
• Isotonic: no net change.

Answer:

D. Ion Pump

Second Question: