Which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal? which of the following is most likely true of a protein that cotransports glucose and sodium ions into the intestinal cells of an animal? sodium ions can move down their electrochemical gradient through the cotransporter whether or not glucose is present outside the cell. glucose entering the cell down its concentration gradient provides energy for uptake of sodium ions against the electrochemical gradient. a substance that blocks sodium ions from binding to the cotransport protein will also block the transport of glucose. the cotransporter can also transport potassium ions. sodium and glucose compete for the same binding site in the cotransporter.