What type of transport is used for glucose reabsorption in the nephron?

Glucose reabsorption in the nephron primarily utilizes secondary active transport. This process occurs in the proximal convoluted tubule, where sodium ions are actively transported out of the tubular cells and into the interstitial fluid. This creates a concentration gradient that allows glucose to follow along with sodium back into the cells against its own concentration gradient.

In this scenario, glucose does not directly use ATP for its movement; rather, it relies on the sodium gradient established by the active transport of sodium ions. This method of transport is considered secondary active transport because it is dependent on the primary active transport of sodium. Ultimately, this allows the nephron to reclaim glucose from the filtrate efficiently, ensuring that essential nutrients are not lost in urine.