Biology, asked by priyanka214, 1 year ago

define osmosis in details

Answers

Answered by Jagrati11
1
the spotaneous movement of water from the region of higher to lower concentration through semi permeable membrane.
three types of osmosis..
hypertnic
hypotonic
isotonic
Answered by mitesh6
0
Examples of Osmosis

Osmosis is how plants are able to absorb water from soil. The roots of the plant have a higher solute concentration than the surrounding soil, so water flows into the roots. In plants, guard cells are also affected by osmosis. These are cells on the underside of leaves that open and close to allow gas exchange. When the plant’s cells are full of water, the guard cells swell and open the stomata, small holes that allow the plant to take in carbon dioxide and release oxygen.

Osmosis can have adverse effects on animals such as fish. If freshwater or saltwater fish are put into water that has a different salt concentration than they are used to, they will die from having too much water enter or leave their cells. Osmosis can affect humans as well; in a person infected with cholera, bacteria overpopulate the intestines, leaving the intestines unable to absorb water. The bacteria actually reverse the flow of absorption because osmosis causes water to flow out of the intestinal cells instead of in. This causes severe dehydration and sometimes death. A milder effect of osmosis is the way fingers become pruney when placed in water for an extended period of time. They look that way as a result of being bloated from increased water flowing into the cells.

Related Biology Terms

Diffusion – a process by which molecules move from areas of high concentration to areas of low concentration. Osmosis is one type of diffusion.

Solution – a mixture made up of two or more substances where one substance, a solute, is dissolved into another substance, a solvent.

Semipermeable – also known as selectively permeable, this means that only certain substances can pass through a barrier. Cell membranes are semipermeable.

Cell – the smallest unit that makes up a living organism. It includes various different parts called organelles that have functions such as storing genetic material and making proteins and energy.


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