Its 7. its 7 like seriously what else could it be? cmoooooooooon cmoooooooooon
Water is the substance that does not use the aid of an active transport in the absorption of blood capillarities inside the kidney. An active transport would only be applicable if the molecule requires being transferred from an area lower concentration to the area of higher concentration across a membrane.
It should just be the cell membrane, which regulates what comes into the cell and what leaves it.
