Which of the Following Statements Regarding Renal Handling of Na⁺

Multiple Choice

Which of the following statements regarding renal handling of Na⁺ is correct?

A) In the proximal tubule, Na⁺ is actively transported across the luminal membrane of the tubular epithelial cells.
B) Atrial natriuretic factor increases Na⁺ reabsorption.
C) In the absence of aldosterone, Na⁺ will be secreted by the cortical collecting ducts.
D) Na⁺ is actively reabsorbed in the ascending limb of the loop of Henle.
E) Without vasopressin, the collecting duct is impermeable to Na⁺.