Proximal Tubule Sodium Reabsorption Quiz
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Questions and Answers

What is responsible for the reabsorption of approximately 65% of the filtered sodium load in the proximal tubule?

  • Na,K-ATPase pump units (correct)
  • Sodium-hydrogen exchanger (NHE-3)
  • Amino acid transporters
  • Glucose transporters
  • Which transporter couples sodium to the entry of glucose, amino acid, phosphate, and other organic molecules in the proximal tubule?

  • Phosphate transporters
  • Sodium-hydrogen exchanger (NHE-3)
  • Na,K-ATPase pump units
  • Glucose transporters (correct)
  • What is the quantitatively more significant mechanism for the entry of sodium in the proximal tubule?

  • Phosphate transporters
  • Amino acid transporters
  • Sodium-hydrogen exchanger (NHE-3) (correct)
  • Na,K-ATPase pump units
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