Which of the Following Best Describes Sodium Movement in the Proximal

question 83

Multiple Choice

Which of the following best describes sodium movement in the proximal tubule?

• A) Sodium is transported across the basolateral membrane by the Na⁺/K⁺ pump and across the apical membrane by secondary active transport.
• B) Sodium is transported across the apical membrane by the Na⁺/K⁺ pump and across the basolateral membrane by diffusion through sodium channels.
• C) Sodium is transported across the apical membrane by the Na⁺/K⁺ pump and across the basolateral membrane by secondary active transport.
• D) Sodium is transported across the apical membrane by the Na⁺/K⁺ pump and across the basolateral membrane by facilitated diffusion.
• E) Sodium is transported across the basolateral membrane by the Na⁺/K⁺ pump and across the apical membrane by diffusion through sodium channels.

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