Which part of the nephron is responsible for reabsorbing water and ions to maintain homeostasis?

The collecting duct plays a critical role in reabsorbing water and ions, which is essential for maintaining homeostasis in the body. As urine passes through the collecting duct, it encounters various hormones, such as antidiuretic hormone (ADH), which increase the permeability of the duct to water. When ADH levels are high, more water is reabsorbed into the bloodstream, concentrating the urine and helping to regulate body water levels.

Additionally, the collecting duct is responsible for the fine-tuning of electrolyte balance, allowing for the adjusted reabsorption of sodium and secretion of potassium based on the body’s needs. This process is vital for maintaining the acid-base balance and overall fluid balance in the body.

While the other parts of the nephron, such as the proximal tubule, distal tubule, and Loop of Henle, also play significant roles in reabsorption, the collecting duct specifically serves to finalize and adjust the concentrations of solutes and water to achieve homeostasis more effectively.