<prompt> Answer this question truthfullyWhat is the role of aldosterone in the body and how does it achieve this role?  <response>: <reason> Aldosterone is a hormone that plays a critical role in regulating electrolyte and fluid balance in the body. Specifically, aldosterone increases renal Na reabsorption, which helps to restore extracellular fluid ECF volume and blood volume to normal levels. This is achieved by increasing the expression of Na channels and NaK ATPase pumps in the cells of the renal tubules, which enhances the reabsorption of Na ions from the urine back into the bloodstream. This process also leads to the excretion of potassium ions K in the urine, helping to maintain proper electrolyte balance. Overall, aldosterone plays a key role in maintaining blood pressure, electrolyte balance, and overall fluid homeostasis in the body. 