Calcium transport in fish gills and intestine

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August undefined, 2024

Weband active transport occurs in isolated fish proximal intestine (Flik et al. 1990; Schoenmakers et al. 1993). Very few studies on Ca2+ transport in fish intestine are … WebJan 9, 2007 · Active transport of Ca 2+ at the gills allows freshwater fish to partake of a continuous supply of the electrolyte, as most freshwaters contain appreciable levels of …

Fish gills: mechanisms of salt transfer in fresh water and sea …

WebNov 1, 2006 · unlike other vertebrates that rely exclusively on dietary calcium to fulfill nutritional requirements, fish absorb a substantial component of their calcium needs from the surrounding water ().The gill is considered to be the predominant site of Ca 2+ uptake, although the skin may play a supplementary role ().The current model for Ca 2+ uptake … WebMar 1, 1993 · ABSTRACT. Transepithelial calcium uptake and transcellular calcium uptake mechanisms were compared in the proximal intestine of freshwater- and seawater … tagebuch luther

(PDF) Calcium transport in gill plasma membranes of the

WebNov 1, 1993 · ABSTRACT. In calcium-transporting epithelia, calcium can move transcellularly (when it passes inwards, from mucosa to serosa) … WebAbstract. For teleost fish living in seawater, drinking the surrounding medium is necessary to avoid dehydration. This is a key component of their osmoregulatory strategy presenting the challenge of excreting excess salts while achieving a net retention of water. The intestine has an established role in osmoregulation, and its ability to ... WebA critical question in transcellular calcium transport relates to the identity of the calcium carrier. Such a carrier is needed if for no other reason than to minimize toxicity due to a … tagebuch martin luther

Gastrointestinal transport of Ca2+ and Mg2+ during the

Endocrine control of calcium homeostasis, a fish perspective

WebApr 3, 2024 · These results show a dynamic transport of MeHg within different organs. After rapid uptake through the gills, MeHg was transported in the heart, the liver, and the brain, and finally transferred to the muscle. According to the literature, dietary MeHg would be delivered to the liver through a portal system after uptake in the intestine [22,25]. WebMay 11, 2009 · The crustacean moult cycle is a convenient model system in which to study calcium (Ca) homeostasis as vectorial movement across Ca transporting epithelia (gills, gastric epithelium, cuticular hypodermis, antennal gland) which occurs in either direction at different stages of the moulting cycle. Intermoult crustaceans are in relative Ca balance. tagebuch ostfront 81WebSep 1, 2009 · Rapid growth in juvenile fish increases calcium demand, and the intestine may play a role in calcium homeostasis at this life stage, in addition to branchial and … tagebuch pinterest

"WebThe branchial epithelium of the gills of freshwater fish is a good model for tight epithelia, whereas the gills of seawater fish and the intestine present a model for leaky epithelia. … " - Calcium transport in fish gills and intestine

Calcium transport in fish gills and intestine

Ca2+-driven intestinal HCO(3)(-) secretion and CaCO3 ... - PubMed

WebJul 9, 2016 · Calcium (Ca 2+) is an essential ion required for critical physiological processes in almost all organisms.Therefore, maintaining Ca 2+ homeostasis is of vital importance. In mammals, Ca 2+ is absorbed across intestinal or renal epithelia by two routes: a passive, non-saturable, poorly regulated paracellular process, and an active, saturable, highly … WebFeb 1, 2024 · 1. Introduction. Intestinal calcium absorption occurs by paracellular and transcellular mechanisms. Paracellular transport is passive, non-saturable, dependent …

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Web1. Calcium (re)absorption occurs in epithelia, including the intestine, kidney, mammary glands, placenta and gills (in the case of fish). 2. Calcium is transported across … WebFeb 27, 2013 · Marine teleost fish continuously ingest seawater to prevent dehydration and their intestines absorb fluid by mechanisms linked to three separate driving forces: 1) cotransport of NaCl from the gut fluid; 2) bicarbonate (HCO(3)(-)) secretion and Cl(-) absorption via Cl(-)/HCO(3)(-) exchange fueled by metabolic CO(2); and 3) alkaline …

WebJan 1, 2013 · The hormonal control of calcium metabolism in fish varies substantially from that in mammals, and the differences appear to reflect both phyletic and environmental factors. For example, whereas ... WebNov 1, 1993 · The regulation of transcellular inward calcium transport determines whether net absorption occurs and the regulation of paracellular calcium transport is pivotal to …

WebJan 1, 1995 · Fish gills provide a model for a tight epithelium in which stanniocalcin (STC) is a hormone that controls apical membrane calcium transport via second messenger mediated carriers or channels61; prolactin 24 (PRL) and/or cortiso119 determine the transport capacity of the calcium transporting cell by determining the number of … WebElevated mucosal cadmium (Cd) did not appear to inhibit Ca uptake into the blood space in any of the GIT sections, and Ca uptake did not appear to be sodium dependent. Maximum transport capacities for Ca and Cd were found to be comparable between the gills and gut, but affinities were much higher at the gills (up to 3000 times).

WebMar 15, 1993 · The euryhaline tilapia Oreochromis mossambicus kept in fresh water takes up calcium mainly from the water via the gills, like other freshwater fish. In the gills …

WebApr 26, 2024 · In fish, Ca is taken up along three pathways, (1) directly from the water via the gills, which contain a lot of ion-transporting cells or chloride cells (also known as ionocytes), but also through the intestine … tagebuch windows 10WebCalcium Transport. 72 Transepithelial calcium transport is a complex multistep process that entails the movement of cations through the glycocalyx region and across the brush … tagebuch handy und pcWebSep 1, 2009 · Rapid growth in juvenile fish increases calcium demand, and the intestine may play a role in calcium homeostasis at this life stage, in addition to branchial and renal transport. This study examined calcium flux in the gastrointestinal tract (GIT) of freshwater juvenile lake sturgeon acclimated to 0.14, 0.34, and 2.26 mmol L − 1 environmental ... tagebuch phpWeb1971 Fish gills: mechanisms of salt ... Chapter 13 Cellular mechanisms in calcium transport and homeostasis in fish Environmental and Ecological Biochemistry, 10.1016/S1873-0140(06)80039-1, ... Skadhauge E (1974) Coupling of Transmural Flows of NaCl and Water in the Intestine of the EEL ( Anguilla Anguilla ) , Journal of Experimental … tagebuch open sourceWebCalcium transport in gill plasma membranes of the crab Carcinus maenas: evidence for carriers driven by ATP and a Na + gradient. J. Exp. Biol. 195: 109–122. Google Scholar Flik, G., Verbost, P.M. and Wendelaar Bonga, S.E. 1995a. Calcium transport processes in fishes. In Fish Physiology. Vol. tagebuch software professionellWebNov 1, 1994 · Fish gills provide a model for a tight epithelium in which stanniocalcin (STC) is a hormone that controls apical membrane calcium transport via second messenger mediated carriers or channels ... tagebuch warrior catsWebThe branchial epithelium of the gills of freshwater fish is a good model for tight epithelia, whereas the gills of seawater fish and the intestine present a model for leaky epithelia. Generally, the regulation of transcellular inward calcium transport determines whether net absorption occurs and the regulation of paracellular calcium transport ... tagebuch textsorte