When a cell is immersed in a hypertonic solution, osmotic pressure tends to force water to flow out of the cell in order to balance the concentrations of the solutes on either side of the cell membrane.
The mixture of a solute in a solvent is called a solution. The Plasma Membrane and Cytosol If the outside environment of a cell is water-based, and the inside of the cell is also mostly water, something has to make sure the cell stays intact in this environment. As a prokaryotic cell does not have a nucleus, the DNA is in the cytoplasm.
The cytoplasm does not include the nucleus. There are many proteins throughout the membrane. For cell transport, diffusion is the movement of small molecules across the cell membrane. Figure 8. The end result is an equal concentration, or equilibrium, of molecules on both sides of the membrane.
Some organisms have evolved intricate methods of circumventing hypertonicity. An open door is completely permeable to anything that wants to enter or exit through the door. Isotonic solution, no net flow. It is the random motion of the molecules that causes them to move from an area of high concentration to an area with a lower concentration.