CA++-ATPASE AND NA+,K+-ATPASE ACTIVITIES IN THE FUNGIFORM PAPILLA OF THE TONGUE OF RANA-ESCULENTA (ANURA, RANIDAE)

被引:8
作者
GIOGLIO, L
RAPUZZI, G
QUACCI, D
机构
[1] UNIV PAVIA, IST FISIOL GEN, I-27100 PAVIA, ITALY
[2] UNIV CAGLIARI, DIPARTIMENTO CITOMORFOL, I-09100 CAGLIARI, ITALY
关键词
D O I
10.1002/jmor.1052100203
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 ;
摘要
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.
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页码:117 / 131
页数:15
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