Evaluate the effectiveness of the sodium-glucose symporter in transporting glucose into intestinal epithelial cells.

The sodium-glucose symporter is ineffective because it moves both sodium and glucose down their concentration gradients.

The sodium-glucose symporter effectively transports glucose by using the sodium gradient to move glucose against its concentration gradient.

The sodium-glucose symporter passively transports glucose down its concentration gradient.

The sodium-glucose symporter is ineffective because it requires ATP to transport glucose.