What is the primary driving force for glucose transport intoproximal tubule cells?

Part A What is the primary driving forcefor glucose transport into proximal tubule cells?

ATP hydrolysis allows active transport of glucose.

Sodium concentration gradient allows secondary active transportof glucose.

The apical Na⁺/K⁺-ATPase creates agradient for K⁺, which can then flow down itsconcentration gradient to allow co-transport of glucose.

Glucose moves down its concentration gradient into tubularcells.

Part B

If all glucose is normally reabsorbed in the proximal tubule ofthe nephron, why do people with diabetes have glucose in theirurine?

Some glucose is secreted at the distal tubule when serumglucose concentrations are high.

The glucose concentration is below its saturation point.

The plasma concentration is greater than the renalthreshold.

The excreted glucose is a product of chemical pathways thatoccur in the urine of diabetic patients.

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