With secondary active transport, the movement of
A)H+ out of a cell by antiport is downhill
B)amino acids into the cell by symport is uphill
C)glucose into a cell by cotransport is downhill
D)H+ is in the same direction as the movement of Na+
E)glucose is in the opposite direction as the movement of Na+

Question

Quizplus · Accepted Answer

Secondary active transport involves the uphill movement of one substance (e.g. Na+) down its electrochemical gradient to provide energy for the uphill movement of a second substance (e.g. amino acids) against its concentration gradient. In symport, both substances move in the same direction (in this case, into the cell), so the movement of amino acids is uphill. The other answer choices are incorrect because they either describe downhill movement (choice A and C) or incorrect directionalities (choice D and E).

With Secondary Active Transport, the Movement of