1
molecules move from areas of high concentration to areas of low concentration across a membrane with the help of a transport protein
2
movement of things in and out of a cell without needing any energy
3
protein in a cell membrane that can open and close to let molecules in and out of a cell
4
movement of molecules across a membrane that requires energy
5
movement of molecules from areas of high concentration to areas of low concentration
6
movement of water molecules across a membrane from areas of high concentration to low concentration
7
energy used for active transport
