Question 19

(Multiple Choice)

Many amino acids in our diet are absorbed via the transcellular transport pathway by the intestinal epithelial cells. This process requires ATP hydrolysis by …


A) the Na⁺-amino acid symporters in the apical domain of the plasma membrane.
B) the Na⁺-amino acid antiporters in the apical domain of the plasma membrane.
C) the Na⁺-K⁺ pumps in the basal and lateral domains of the plasma membrane.
D) the amino acid carriers in the basal domain of the plasma membrane.
E) F-type ATPases in the apical domain of the plasma membrane.

Answer