Which substance provides energy and is a key component of hypertonic solutions like Mannitol?

The substance that provides energy and is a key component of hypertonic solutions like Mannitol is glucose. Glucose is a simple sugar and a primary energy source for the body's cells. It is easily metabolized, making it essential for fueling physiological processes, particularly during stress, illness, or when the body requires rapid energy.

Hypertonic solutions, like Mannitol, often utilize glucose due to its ability to generate osmotic pressure, which helps draw fluid into the vascular space. This is crucial in medical contexts, such as treating cerebral edema and certain types of kidney dysfunction, where you want to decrease intracranial pressure or promote diuresis.

While fatty acids, sugars in general, and proteins all have roles in energy metabolism or nutrition, glucose is specifically recognized as a critical component in hypertonic solutions due to its specific properties and metabolic pathways.