And that means it uses these cells use ATP to actually move the glucose across. Now, two examples of these specialized types of cells are cells found in the kidneys and cells found in our small intestine. Now, in our kidneys, we want to make sure that none of the glucose actually ends up in the urine. And that's exactly why these kidney cells are specialized to have these active transport proteins that use ATP to move our glucose against electrochemical gradient, because we want to absorb all the glucose from our filtrate, from our urine. Now, in our small intestine, that is where we absorb most of our glucose molecules. And that's exactly why we want to be able to move the glucose across the cell membrane, regardless of what the electrochemical gradient of the glucose is.