Plasma membrane is permeable to water. How does a cell show endosmosis or exosmosis?

Plasma membrane is permeable to water; therefore, water can move inward as well as outward depending on the concentration of solution in which the cell is placed. The movement of water occurs from the region of high water concentration to a region of low water concentration. When a cell is placed in hypotonic solution (dilute solution), water enters into the cell, hence cell will show endosmosis. While a cell is placed in hypertonic solution, cell will show exosmosis because the medium has lower concentration of water than the cell sap.