Tag: Hypertonicity

Despite the common misconception, dehydration and fluid volume deficit are not interchangeable terms and describe different physiological states. Dehydration specifically refers to a loss of total body water, leading to a higher concentration of solutes, while fluid volume deficit (hypovolemia) is a reduction in the body's extracellular fluid volume, including blood plasma.

Over 60% of the human body is water, making fluid balance a critical biological function. The intricate system that maintains this balance is largely controlled by the brain, which orchestrates several powerful signals. So, what is the strongest trigger for thirst and how does your body know when it needs to drink?