What type of solution would be used to make a cell "normal"?

To determine the type of solution that would make a cell "normal," it is essential to understand how different solutions affect cell volume and osmotic balance. An isotonic solution is one that has the same concentration of solutes as the cytoplasm of the cell. When a cell is placed in an isotonic solution, there is no net movement of water into or out of the cell. This balance maintains the cell's shape and function, allowing it to remain in a "normal" state.

In contrast, placing a cell in a hypotonic solution would result in water moving into the cell, which could cause it to swell and potentially burst. Conversely, a hypertonic solution would draw water out of the cell, leading to shrinkage and possibly causing dysfunction. An aqueous solution generally refers to a water-based solution and does not specify the solute concentration, thus lacking the specificity needed to address the question.

The use of an isotonic solution, therefore, preserves the cell's internal environment and ensures that it operates effectively, maintaining homeostasis. This is why isotonic solutions are commonly used in medical settings for intravenous fluids to rehydrate patients without causing cell damage.