Which transport process would be used by a renal tubular cell to reabsorb glucose from the filtrate into the bloodstream against its concentration gradient, using the sodium gradient established by Na⁺/K⁺-ATPase?
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Correct answer: Secondary active transport via Na⁺ symport
Glucose reabsorption in the kidney often uses a Na⁺–glucose symporter: Na⁺ moves down its gradient, providing the energy to carry glucose against its gradient, a classic example of secondary active transport.
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