Publication: Electron microscopic studies of ion- and H20-transporting epithelial cells in the horizontal ampulla of the pigeon
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Date
2001
Authors
Villegas, H. ; Merker, H. J. ; Helling, K. ; Clarke, A.H. ; Scherer, H.
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Publisher
Murcia : F. Hernández
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DOI
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info:eu-repo/semantics/article
Description
Abstract
Earlier morphological studies of the
epithelial structure in the semicircular canals of
mammals have focused on the sensory cells of the crista
ampullaris. This report draws attention to the fact that
there exist at least seven further cell types in the
horizontal ampulla walls of pigeon with various
functions; the role of ion- and H20-transporting
epithelial cells is dealt with here in detail. While the dark
cells appear to play a decisive role in the regulation of
ionic composition, the cells in the planum semilunatum
may transport H20 and assist in the regulation of
endolymph volume. In addition, protein-secreting
structures are located in the apical region of the cells of
the planum semilunatum. The question whether the
proteins are dispersed in the endolymph or contribute to
cupula formation remains unclear. The morphology and
possible functions of these two cell types are discussed
on the basis of electron microscopic results.
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