0 Something, for example a cell membrane, that is semipermeable allows some liquids and gases to pass through it, but not others. --
1 allowing some liquids and gases, but not others, to pass through --
A typical thermodynamic process consists of a redistribution of a conserved quantity between a system and its surroundings across an unchanging semi-permeable wall between them.
A semipermeable membrane is a thin layer of material that contains holes of various sizes, or pores.
Ideally, a wall may be declared adiabatic, diathermal, impermeable, permeable, or semi-permeable.
It is similar to osmosis in that they both involve the semipermeable nature of the cell membrane.
Reverse osmosis is theoretically the most thorough method of large scale water purification available, although perfect semi-permeable membranes are difficult to create.
They surround cells and organelles with a semi-permeable barrier that prevents free flow of substances.
One theoretical means would be through an ideal semi-permeable membrane.
A semipermeable membrane is necessary because it allows water through its membrane while preventing solutes from moving through its membrane.
