Which of the following solutions is suitable for normal body conditions?

A slightly hypotonic solution is suitable for normal body conditions because it provides an environment that maintains cell integrity and osmotic balance. In biological systems, cells function best when they are in an environment that closely resembles their internal conditions, which includes the concentration of solutes in the extracellular fluid.

In a slightly hypotonic solution, the osmotic pressure is lower than that inside the cells. This allows for a gradual movement of water into the cells without causing excessive swelling or potential lysis. Many bodily fluids, like blood plasma, are isotonic, and a slightly hypotonic solution can help maintain this balance.

It's important to note that hypertonic solutions contain a higher concentration of solutes compared to the inside of cells, which can lead to water leaving the cells, causing them to shrink and potentially become dysfunctional. Concentrated solutions may disrupt cellular homeostasis due to their high solute content, which can adversely affect cellular activity. High isotonic solutions, while maintaining osmotic balance, may not provide the slight osmotic push that is beneficial for cell function in certain conditions. Thus, being in a slightly hypotonic environment facilitates the healthy exchange of water and nutrients, aligning well with normal physiological conditions.