True or false questions: 1. when a cell is put into an isotonic solution, individual water molecules cannot move back and forth across the cell membrane. 2.when a cell is put into a hypertonic solution, there is a net movement of water molecules across the cell membrane into the cell.. 3.when a cell is put into a hypotonic solution, there is a net movement of water molecules across the cell membrane out of the cell. 4.the movement of any solvent across a semi-permeable membrane is called osmosis.