In Intestinal Epithelial Cells, a Transport Protein Moves Glucose into the Cytoplasm

Multiple Choice

In intestinal epithelial cells, a transport protein moves glucose into the cytoplasm against its concentration gradient at the same time that it transports Na⁺ into the cell down its electrochemical gradient. Which of the following CORRECTLY describes this cotransport of glucose and sodium?

A) Primary active transport by a symporter.
B) Secondary active transport by an antiporter.
C) Secondary active transport by a symporter.
D) Primary active transport by an antiporter.