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English Wikipedia
The taste of table salt
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Pflugers Arch
2015[Mar]; 467
(3
): 457-63
PMID25559847
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Solutions of table salt (NaCl) elicit several tastes, including of course
saltiness but also sweet, sour, and bitter. This brief review touches on some of
the mileposts concerning what is known about taste transduction for the Na(+)
ion, the main contributor to saltiness. Electrophysiological recordings,
initially from single gustatory nerve fibers, and later, integrated impulse
activity from gustatory nerves led researchers to predict that Na(+) ions
interacted with a surface molecule. Subsequent studies have resolved that this
molecule is likely to be an epithelial sodium channel, ENaC. Other Na(+)
transduction mechanisms are also present in taste buds but have not yet been
identified. The specific type(s) of taste cells responsible for salt taste also
remains unknown.