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Ultrastructure of the type “B” cells in the rectal pad epithelium of Locusta migratoria
Author(s) -
Peacock A. J.
Publication year - 1979
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.1051590205
Subject(s) - biology , ultrastructure , endoplasmic reticulum , epithelium , anatomy , columnar cell , microtubule , apical membrane , hemidesmosome , vacuole , microbiology and biotechnology , hindgut , septate junctions , cytoplasm , cell type , cell , intracellular , biochemistry , midgut , gap junction , genetics , botany , larva
The electron microscopical structure of the type “B” cells in the rectal pad epithelium of Locusta is described. The type “B” cells occur singly in the distal region of the rectal pad epithelium. They are characteristically goblet shaped and join with contiguous type “A” or rectal pad cells, near the apical surface by means of a restricted region of septate desmosomes. Type “B” cells possess a microvillate apical membrane, with the villi arranged as a rosette overlying the apical inaginations of adjacent type “A” cells. Large numbers of microtubules and vacuoles of various sizes containing an assortment of inclusions are present in the apical region of the type “B” cells. Many of the microtubules insert distally on hemidesmosomes located in the apical plasma membrane. Rough endoplasmic reticulum and mitochondria are also present but neither are abundant. The possible significance of these findings is discussed.