Active transport requires energy for the Na-K pump to transport Na out of the cell,thereby driving the transport of another substance (e.g.,glucose)when the Na re-enters the cell down its concentration gradient.

Question

Quizplus · Accepted Answer

Active transport requires energy, in the form of ATP, for the Na-K pump to move Na out of the cell against its concentration gradient. This creates a concentration gradient that can be used to drive the transport of another substance, such as glucose, into the cell. Glucose enters the cell through a co-transporter protein that moves glucose along with Na down its concentration gradient, which is created by the active transport of Na. Therefore, active transport is necessary to drive the movement of glucose into the cell.

Active Transport Requires Energy for the Na-K Pump to Transport