What is the name given to the movement of glucose or amino acids from the gut into the cells lining the gut, when they bind to a transport protein that has also bound a sodium ion

D: the sodium ion was transported out of the cell with the use of

energy in order to set up the sodium concentration gradient. This gradient then

allows other molecules to enter the cell along with sodium’s re-entry. This is

active (because energy used), but secondary as it occurs as a result of the previous

active transport event.