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Effect of different solutions on blood cells

Plant cell under different environments

In biology, a hypertonic cell environment has a higher concentration of solutes than inside the animal or plant cell. The ability of a solution to change the shape or tone of cells by altering their internal water volume is called tonicity (tono = tension). In a hypertonic environment, osmotic pressure causes water to flow out of the cell. If enough water is removed in this way, the cytoplasm will have such a small concentration of water that the cell has difficulty functioning. Image File history File links Question_book-3. ... Image File history File links Broom_icon. ... Image File history File links Osmotic_pressure_on_blood_cells_diagram. ... Image File history File links Osmotic_pressure_on_blood_cells_diagram. ... Image File history File links Turgor_pressure_on_plant_cells_diagram. ... Image File history File links Turgor_pressure_on_plant_cells_diagram. ... Biology studies the variety of life (clockwise from top-left) E. coli, tree fern, gazelle, Goliath beetle Biology (from Greek: βίος, bio, life; and λόγος, logos, knowledge), also referred to as the biological sciences, is the study of living organisms utilizing the scientific method. ... Drawing of the structure of cork as it appeared under the microscope to Robert Hooke from Micrographia which is the origin of the word cell being used to describe the smallest unit of a living organism Cells in culture, stained for keratin (red) and DNA (green) The cell is the... For other uses, see Concentration (disambiguation). ... Making a saline water solution by dissolving table salt (NaCl) in water This article is about chemical solutions. ... Tonicity is a measure of effective osmolarity or effective osmolality. ... This article or section does not adequately cite its references or sources. ... Organelles. ...

A cell that is in a hypertonic environment has a higher concentration of solute in the environment than in the inside of the cell, making the net flow of water out of the cell. A cell in a hypotonic environment has a lower concentration of solute in the environment than in the inside of the cell, making the net flow of water into the cell and eventually causing cell lysis. This article does not cite any references or sources. ... This article is about the biological definition of the word Lysis. ...

In animal cells, being in a hypertonic environment results in crenation, where the shape of the cell becomes distorted and wrinkled as water leaves the cell. This article or section does not cite its references or sources. ...

In plant cells, the effect is more dramatic. The cell membrane pulls away from the cell wall, but the cell remains joined to the adjacent cells at points called plasmodesmata. Thus, the cell takes on the appearance of a pincushion, with the plasmodesmata almost ceasing to function because they have become so constricted. This condition is known as plasmolysis. For other uses, see Plant (disambiguation). ... Look up cell membrane in Wiktionary, the free dictionary. ... Plant cells separated by transparent cell walls. ... Plasmodesmata (Singular, plasmodesma) are small cell junctions in a plant cell which connect the cytoplasm of adjacent plant cells, forming a circulatory and communication system connecting the cells in plant tissue. ... A pincushion (or less commonly pin cushion) is a small cushion, typically 3-5 cm across, which is used in sewing to store pins with their heads protruding so as to take hold of them easily. ... Before Plasmolysis. ...

Saltwater is hypertonic to the fish that live in it. The fish cannot isolate themselves from osmotic water loss, because they need a large surface area in their gills for gas exchange. They respond by drinking large amounts of water, and excreting the salt. This process is called osmoregulation. Annual mean sea surface salinity for the World Ocean. ... For other uses, see Fish (disambiguation). ... For other uses, see Gill (disambiguation). ... Gas exchange or respiration takes place at a respiratory surface - a boundary between the external environment and the interior of the body. ... The kidneys are important excretory organs in vertebrates. ... Osmoregulation is the active regulation of the osmotic pressure of bodily fluids to maintain the homeostasis of the bodys water content; that is it keeps the bodys fluids from becoming too dilute or too concentrated. ...

The opposite of a hypertonic environment is a hypotonic one, where the net movement of water is into the cell; the intermediate state is called isotonic, where there is no net movement of water. This does not mean, however, that water is not moving; it means that water is moving both ways but with equal velocity, which equals zero net change. 70. ...

Hyperosmotic

"...a term describing organisms with body fluids with a lower concentration of water and higher solute concentration than the external environment." Taken from Ecology by Manuel C. Molles Jr.

This means that if a cell is hyperosmotic, it absorbs water from the surroundings to dilute the higher solute concentration, thus making the cell isotonic to the environment. Note: this page refers to dilution in the sense of trademark law. ...

See also

• Diffusion
• Hypotonic
• Isotonic
• Osmosis
• Plasmolysis
• Hypertonia