Hint: Materials must be able to pass across the plasma membrane in order for the cell cytoplasm to interact with the outside world. This movement is accomplished through a variety of mechanisms.
Complete answer: • Diffusion is the process of movement of water from plasma membrane from higher concentration to a lower concentration this includes the role of Aquaporins. • Osmosis is the movement of water from higher concentration to lower concentration through a selectively permeable membrane that is only restricted movement of water only no solute or ion can move. • There are different types of solution in which cells are placed which leads to which leaves the cell to shrink or to gain water. • Concentration of solution as compared to another solution is said to be tonicity. • Isotonic solution: when a cell placed in the solution has the same concentration as that of surrounding. • Hypotonic solution: when the solution has a higher concentration of solutes than. The water moves from higher concentration to lower concentration. Water moves out of the cell and cell shrinks • A hypertonic solution is the solution when the solute concentration is lower than the cell. so, the water enters the cell and the cell Swells. • increased solute concentration causes the cell to shrink.
Note: Water and different substances such as protein minerals can move in and out of the cell through a semipermeable membrane this is facilitated by simple diffusion or osmosis. Tonicity is the concentration of solution as compared to another solution it is described in the amount of solute dissolved in the solution.