| 词条 | Chloride cell |
| 释义 |
Chloride cells are cells in the gills of teleost fishes which pump excessive sodium and chloride ions out into the sea against a concentration gradient in marine fish. Alternatively, in the gills of freshwater teleost fish, they pump sodium and chloride ions into the fish, also against a concentration gradient. Mechanism of actionMarine teleost fishes consume large quantities of seawater to reduce osmotic dehydration.[1] The excess of ions absorbed from seawater is pumped out of the teleost fishes via the chloride cells.[1] These cells use active transport on the basolateral (internal) surface to accumulate chloride, which then diffuses out of the apical (external) surface and into the surrounding environment.[2] Such mitochondria-rich cells are found in both the gill lamellae and filaments of teleost fish. Using a similar mechanism, freshwater teleost fish use these cells to take in salt from their dilute environment to prevent hyponatremia from water diffusing into the fish. [2] References1. ^1 {{cite web | url =http://www.encyclopedia.com/doc/1O8-chloridecells.html |title=Chloride cells|work=A Dictionary of Zoology| author=Michael Allaby| accessdate =4 July 2015}} 2. ^1 {{Cite book|title = Environmental Physiology of Animals|last = Wilmer|first = Pat|last2 = Stone|first2 = Graham|last3 = Johnston|first3 = Ian|publisher = Blackwell|year = 2005|isbn = 978-1-4051-0724-2|location = Malden, MA|pages = 85}} External links
3 : Cells|Fish anatomy|Teleostei |
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