Secondary — Active Transport Glucose [repack]

Reabsorbing glucose from the filtrate so it isn't lost in urine. Step 1: Setting the Stage (The Na+/K+ Pump)

The mechanism of secondary active transport of glucose involves the following steps: secondary active transport glucose

Before glucose can move, a gradient must exist. The (a primary active transporter) uses ATP to pump sodium ( Na+cap N a raised to the positive power ) out of the cell and potassium ( K+cap K raised to the positive power Reabsorbing glucose from the filtrate so it isn't

The cell places a specific protein in the membrane called the . This protein has two "seats." This protein has two "seats

Absorbing glucose from the food we eat.

SGLT1 uses the energy from the downhill flow of Na⁺ (into the cell) to drive glucose uptake against its concentration gradient. The stoichiometry is 2 Na⁺ : 1 glucose, which allows glucose to be concentrated up to 100× inside the cell — a thermodynamic marvel at the molecular scale.

To keep our blood sugar regulated and our cells powered, the body employs a sophisticated mechanism known as . What is Secondary Active Transport?