Difference between revisions of "Osmosis"
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: [[Osmosis]] is a passive process which means it does not require [[energy]] to take place. | : [[Osmosis]] is a passive process which means it does not require [[energy]] to take place. | ||
: A high [[water]] [[concentration]] means [[water]] with very little [[dissolve]]d [[salt]]s or [[sugar]]s. A low [[water]] [[concentration]] is [[water]] with a high [[concentration]] of [[salt]]s or [[sugar]]s in [[solution]]. | : A high [[water]] [[concentration]] means [[water]] with very little [[dissolve]]d [[salt]]s or [[sugar]]s. A low [[water]] [[concentration]] is [[water]] with a high [[concentration]] of [[salt]]s or [[sugar]]s in [[solution]]. | ||
| − | : A [[Partially Permeable Membrane|partially permeable membrane]] is a [[membrane]] which only allows through certain [[molecule]]s. This is often small [[molecule]]s like [[water]] that can pass through but not larger [[molecule]]s like [[sugar]]. However, the [[Cell Membrane|cell membrane]] is selectively permeable which means it can control | + | : A [[Partially Permeable Membrane|partially permeable membrane]] is a [[membrane]] which only allows through certain [[molecule]]s. This is often small [[molecule]]s like [[water]] that can pass through but not larger [[molecule]]s like [[sugar]]. However, the [[Cell Membrane|cell membrane]] is selectively permeable which means it can control which [[molecule]]s pass through. |
''NB: Water Concentration may be referred to as 'Water Potential' in some textbooks.'' | ''NB: Water Concentration may be referred to as 'Water Potential' in some textbooks.'' | ||
Revision as of 08:52, 5 June 2019
Key Stage 4
Meaning
Osmosis is the diffusion of water from a high water concentration to a low water concentration through a partially permeable membrane.
About Osmosis
- Osmosis is how plants get water through their roots and how animals gain water through the walls of the Small Intestine and Large Intestine.
- Osmosis is how cells absorb and release water.
- Osmosis is a passive process which means it does not require energy to take place.
- A high water concentration means water with very little dissolved salts or sugars. A low water concentration is water with a high concentration of salts or sugars in solution.
- A partially permeable membrane is a membrane which only allows through certain molecules. This is often small molecules like water that can pass through but not larger molecules like sugar. However, the cell membrane is selectively permeable which means it can control which molecules pass through.
NB: Water Concentration may be referred to as 'Water Potential' in some textbooks.