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Ca ++ ‐ and Na + , K + ‐ATPase activities in the fungiform papilla of the tongue of Rana Esculenta (Anura Ranidae)
Author(s) -
Gioglio Luciana,
Rapuzzi Giovanni,
Quacci Daniela
Publication year - 1991
Publication title -
journal of morphology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.652
H-Index - 74
eISSN - 1097-4687
pISSN - 0362-2525
DOI - 10.1002/jmor.1052100203
Subject(s) - major duodenal papilla , biology , lingual papilla , neuroepithelial cell , anatomy , rana , apical membrane , calcium , epithelial polarity , atpase , biophysics , microbiology and biotechnology , membrane , biochemistry , medicine , enzyme , taste , stem cell , neural stem cell
In the fungiform papilla of Rana esculenta (Anura Ranidae), the Ca ++ ‐ATPase is mainly distributed on the basolateral membrane of the sensory area cells (i.e., neuroepithelial, supporting, and mucous cells). Apical membranes of all cells facing the surface present a slight enzymatic activity. Lateral wall cells have a strong Ca ++ ‐ATPase activity on basolateral and apical membranes. Strong Na + , K + ‐ATPase activity occurs on the apical surface of neuroepithelial cells. Ca ++ ‐ATPase activity is absent on the surface of endothelial cells of the capillaries located under the sensory area. These observations lead us to conclude that the sensory area of fungiform papilla is the selective way for calcium influx. Furthermore the absence of ATPase activity on the surface of the endothelial cells indicates that there is no functional barrier to calcium influx into capillary, and that calcium can be removed by vessels from the sensory area.