What is the correct composition of physiological saline?

The correct composition of physiological saline is defined as a solution containing 0.9 grams of sodium chloride dissolved in 100 milliliters of water. This formulation creates an isotonic solution that matches the osmolarity of body fluids, which is crucial for maintaining cellular stability and proper hydration when administered to patients.

In medical settings, physiological saline is commonly used for various purposes, including hydration, as a diluent for medications, and during intravenous therapy to replace lost fluids or electrolytes. Its isotonic property helps to prevent cellular lysis or shrinkage, making it particularly useful in various treatments, including hemodialysis, where maintaining osmotic balance is essential.

The other options do not describe physiological saline accurately. A 10% salt solution would result in a hypertonic solution, while albumin and fresh frozen plasma are blood products, not saline solutions. Therefore, they cannot serve the same functions as physiological saline in medical practices.