What result occurs when a cell is in a solution with a lower solute concentration than its interior?

• A. The cell shrinks
• B. The cell remains isotonic
• C. The cell swells
• D. The cell is crenated

Answer: (C)

When a cell is placed in a solution with a lower solute concentration than the intracellular environment, a phenomenon known as osmosis takes place. Osmosis is the movement of water across a selectively permeable membrane from a region of lower solute concentration to a region of higher solute concentration.

In this case, since the external solution has a lower solute concentration, water will move into the cell in an attempt to equalize the solute concentrations on both sides of the membrane. As water enters the cell, it causes the cell to swell. If the influx of water is significant enough, it can lead to the cell potentially bursting, which is often referred to as lysis.

This process underscores the importance of understanding osmotic pressure, cell membranes, and the ways in which cells interact with their environments concerning solute concentrations.