### process:

Diffusion process
* appear to be responsible for the unsharpness of the replicated structures.
* can operate in the absence of groundwater flow.

### process | diffusion:

Molecular diffusion
* has a strong influence on mixing.
* prevents depletion of methane by photolysis.

### process | diffusion:

Osmosis
* Describe osmosis and reverse osmosis.
* Most osmosis is part of dialysis.
  * When osmosis happens, water moves from the side of the membrane with a lower amount of osmotic pressure to the side of the membrane with the higher amount. Osmosis fundamental part of cell biochemistry, but also has mechanical applications and usages.
* allows only the smaller molecules to pass through a membrane.
* also depletes water of minerals necessary for good health.
* can occur across cell membranes.
* causes water to flow out of the cell.
* controls the movement of water into and out of cells.
* fundamental effect in all biological systems
* has to do with water movement in and out of membrane.
* is always and only the diffusion of water through a selectively permeable membrane
  - called into action to defeat the germ and save the digestive system
  - diffusion involving water
* is diffusion of water across a biological membrane
  - important in exercise
  - merely diffusion of water molecules across thin barriers called membranes
  - movement of water across the membrane from low to high down the concentration gradient
  - of great importance in many processes that occur in animals and plants
  - one of the main ways in which our body keeps or retains moisture
  - quite dynamic with pressures and concentrations changing minute to minute
  - the diffusion of free water across a membrane
* is the diffusion of water across a cell membrane
  - a differentially permeable membrane
  - a plasma membrane
  - a semi-permeable membrane
* is the diffusion of water molecules across a cell membrane
  - across a selectively permeable membrane
  - across a semipermeable membrane
  - equalization of water, salt, sugar and mineral concentrations
  - movement of solvent molecules through a semipermeable membrane
* is the movement of water across a membrane from weak solutions toward strong solutions
  - selectively permeable membranes
  - by specific carrier proteins that are integral membrane proteins
* is the movement of water molecules from a weak solution to a strong solution
  - through a thin membrane
* is the movement of water through a membrane
  - net migration of water through an osmotic membrane
  - passage of a liquid through a membrane
  - scientific process of transferring fluid between molecules
  - simple diffusion of water across the cell membrane or other semipermeable membrane
  - transfer of water through the cell membrane
  - used to purify salt water in desalinization plants
  - very similar to diffusion excempt it involves the movement of water
* kind of diffusion where water is the substance moving across the membrane.
* maintains the balance between the blood and the other tissues.
* occurs in response to a concentration gradient for an impermeant solute.
* occurs when a membrane separates two solutions of different concentrations
  - water is taken up e.g. Plants take up water from the ground
* plays an important role in the control of the flow of liquids in and out of a living cell.
* probably occurs much as in animal cells.
* rather complicated form of movement.
* special case of diffusion a
  - movement of water across a selective permeable membrane
  - type of diffusion
* specific form of facilitated transport.
* type of diffusion that diffuses water through a selectively permeable membrane.
* veiy important phenomenon in all living things.