Nephron Function and Reabsorption

The nephron is the functional unit of the kidney, responsible for the regulation of water, electrolyte levels, and waste excretion. Each nephron is composed of different segments, each serving distinct roles. The glomerulus facilitates the initial filtration of blood, while the renal tubules are crucial for reabsorption and secretion. The overall health of the kidney is vital for maintaining homeostasis in the body. Therefore, understanding how nephron function contributes to the regulation of substances is essential in human physiology.

Which part of the nephron is primarily responsible for the reabsorption of water, sodium, and bicarbonate?