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Evidence concerning the morphogenesis of saccular receptors in the bullfrog ( Rana catesbeiana )
Author(s) -
Lewis E. R.,
Li C. W.
Publication year - 1973
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.1051390305
Subject(s) - bullfrog , biology , stereocilia (inner ear) , rana , anatomy , hair cell , morphogenesis , amphibian , primordium , microbiology and biotechnology , inner ear , endocrinology , genetics , gene , ecology
A dichotomy of hair‐cell types has been found in the bullfrog sacculus, and considerable evidence supports the view that one type (“peripheral”) is transformed during macular growth to the other type (“central”). Between the periphery and the center of the macula, one finds a gradation of form from “peripheral” to “central” type. Occasionally in adults and more often in stage‐26 tadpoles one finds the presumably younger peripheral type of hair cell occurring well beyond the limits of the macula proper. The apparent morphogenic sequence for saccular hair cells is (1) development of a kinocillum on an endolymphatic epithelial cell, (2) gradual transformation of microvilli into stereocilia, (3) growth of the stereocilia and development of kinociliary bulb, (4) achievement of final size and form.