Final answer:
In animal cells, glucose is transported into the cell along with sodium (Na+) through a process called symport. To work properly, the concentration of Na+ outside the cell must be higher than inside the cell. The maintenance of Na+ inside the cell is carried out by the sodium-potassium pump.
Step-by-step explanation:
In animal cells, the transport of glucose along with sodium (Na+) into the cell is known as symport.
For this type of transport to work, the concentration of Na+ outside the cell must be higher than inside the cell. This creates a concentration gradient that allows Na+ to move into the cell along with glucose.
The maintenance of Na+ inside the cell is carried out by the sodium-potassium pump. This pump actively transports Na+ out of the cell in exchange for K+ ions, maintaining a lower concentration of Na+ inside the cell.