What Causes Osmosis?


How are osmosis and diffusion alike? How are they different?

"Osmosis is the result of diffusion across a semi-permeable membrane" (from wikipedia: http://en.wikipedia.org/wiki/Osmosis).

In both diffusion and osmosis, molecules or atoms move from areas of higher concentration to areas of lower concentration. But the difference is that in osmosis, there is a "semi-permeable membrane" separating the two concentration areas that -- like a one-way street -- prevents the diffused species from going back the other way.

Osmosis is used to purify water, but it can be used for many, many other processes ... and is used a lot in our bodies, in which cell walls are the semipermeable membranes.

What is a good real life example of osmosis being affected by temperature in an animal?

I need to have a real life example of osmosis being affected by temperature in an animal. Preferably human. I know that the rate of osmosis is positively correlated with temperature. More heat = more kinetic energy so the particles move faster. It could also be an organ inside the human body.

Hypertonic and hypotonic cells are the result of osmosis caused by a difference in salt concentration inside a cell. Read the section titled "examples of osmosis" in this article:

http://en.wikipedia.org/wiki/Osmosis

I hope that was helpful

What is the difference between osmosis and diffusion?

A.Diffusion uses energy, but osmosis does not. B.Osmosis is movement of proteins, and diffusion is movement of water. C.Osmosis is a kind of diffusion that involves movement of water. D.Diffusion only occurs in animal cells and osmosis only occurs in plant cells.

Let me explain to you clearly: Diffusion and Osmosis are types of absorption in plants. DIFFUSION: Movement of solvent molecules from a region of higher conc. to a region of lower concentration until they are evenly distributed through available space. Gases such as Oxygen, carbon dioxide and nutrients like minerals move into or between the cells by diffusion. OSMOSIS: Movement of water molecules from a region of higher conc. to a region of lower concentration through a semipermeable membrane is called Osmosis.

Oxygenated vs. Reverse Osmosis water?

What are the pros and cons of both Oxygenated and Reverse Osmosis water?

Oxygenating water is used to oxidize impurities in water. ie. iron, minerals, ect. and is therefore a chemical process. Oxygenation is one of the first methods of water filtration/purification. Oxygenating will eliminate some microbial/bacterial problems but not 100%.

reverse osmosis is a mechanical filtration at less than or equal to 0.1 microns. (very small). and uses a membrane to do so. Unfortunately the yeild of a reverse osmosis system is very low and very costly. Reverse osmosis water has very little or no taste, tastes like distilled water.

bottled water that is "reverse osmosis filtered" usually has minerals and salt added back into the water to give it taste. Neither oxygenation nor reverse osmosis would make a questionable water source potable.

Can there be osmosis without diffusion? Diffusion without osmosis?

There can be no osmosis without diffusion because water DIFFUSES from a hypotonic solution to a hypertonic one (lower concentrated solution to a higher concentrated solution). But there can be diffusion without osmosis because there are different types of diffusion such as facilitated diffusion. I guess you can sort of say that osmosis is a kind of diffusion concerning water whereas simple diffusion does not concern water but concerns other substances such as oxygen. Um...don't know if this answers your question or if this is the kind of answer you're looking for, but goodluck!

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