When Na⁺ Is Actively Transported from Tubular Cells to the Interstitial

Multiple Choice

When Na⁺ is actively transported from tubular cells to the interstitial fluid,

A) no energy is needed.
B) glucose and amino acids are countertransported at the same time.
C) Na⁺ concentration gradient is established between the tubule lumen and tubule cell.
D) water is countertransported by carrier molecules.
E) water is secreted.