What is the primary characteristic of a hypotonic solution?

A hypotonic solution is defined by its lower concentration of solutes in comparison to the concentration of solutes inside the cells. When cells are placed in a hypotonic solution, water flows into the cells due to the osmotic gradient, which can lead to cell swelling and potentially rupture, a process known as lysis. This characteristic is significant in medical settings where understanding fluid balance and the effects of various solutions on cellular health is crucial. The distinction between isotonic, hypotonic, and hypertonic solutions is vital, as it informs treatment decisions for patients requiring fluid therapy, hydration, or electrolyte balance.