NDLI: Ion transport by amphibian antrum in vitro. I. General characteristics.

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Ion transport by amphibian antrum in vitro. I. General characteristics.

Content Provider	Semantic Scholar
Author	Flemström, Gunnar Sachs, T. G.
Copyright Year	1975
Abstract	Both Necturus and bullfrog antrum show stable PD, resistance, and short-circuit current (Isc) when mounted in an Ussing chamber. Measurements of Na+ and Cl minus flux showed that both ions are actively transported across Necturus antrum, Na+ from secretory to nutrient, Cl minus from nutrient to secretory (both net fluxes being similar to 0.30 mueq cm minus 2 h minus 1). Only the Na+ transport contributed to the Isc and PD as evidenced by a) Na+ removal, b) the effects of amiloride on the secretory surface, c) the effects of ouabain on the nutrient side. Microelectrode experiments confirm the Na+ conductance of the secretory cell membrance, a HCO3 minus conductance of both cell membranes, and a KCl conductance across the nutrient cell membrane. In addition, antrum apparently secretes alkali (similar to 0.35 mueq cm minus 2 h minus 1), which secretion is sensitive to metabolic inhibitors and Diamox. Nutrientside HCO3 minus increased the rate of alkaline secretion and a transmucosal HCO3 minus gradient could contribute to ISC and PD. A model is proposed to account for the electrical properties of the tissue.
Starting Page	WDD71
Ending Page	WDD71
Page Count	1
File Format	PDF HTM / HTML
Alternate Webpage(s)	http://ajplegacy.physiology.org/content/228/4/1188?ijkey=a3a22eb5e61aa1c28aa97b28c636e0a089c04609&keytype2=tf_ipsecsha
Alternate Webpage(s)	http://ajplegacy.physiology.org/content/228/4/1188?ijkey=d35a4355854f56d36eccce4286a98fdd8eb48aa9&keytype2=tf_ipsecsha
Alternate Webpage(s)	http://ajplegacy.physiology.org/content/228/4/1188?ijkey=59488fb5804fdb05919ea87f925e93453477bf86&keytype2=tf_ipsecsha
PubMed reference number	236668v1
Volume Number	228
Issue Number	4
Journal	The American journal of physiology
Language	English
Access Restriction	Open
Subject Keyword	Alkalies Amiloride Amphibians Antrum Bicarbonates Cell secretion Ephrin Type-B Receptor 1, human Ion Transport Maxillary Sinus Metabolic Process, Cellular Microelectrodes Necturus Ouabain Parkinson Disease Plasma membrane Potassium Chloride Rana catesbeiana Secretory cell Sodium Sodium-Bicarbonate Symporters
Content Type	Text
Resource Type	Article

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