✍ Scribed by A. J. Peacock
No coin nor oath required. For personal study only.
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.
📜 SIMILAR VOLUMES
The oviducts of Locusta migratoria are innervated by a pair of nerves which arise from the seventh abdominal ganglion. A distinctive network of striated muscle fibres occurs in the oviducts. The lateral oviducts and common oviduct consist of an inner circular layer of muscle and an outer longitudina
Earlier work had shown that JH acts on the membrane of the follicle cell of Locusta migratoria, bringing about a rapid reduction in volume which can be detected in vitro by measuring the increase in optical path difference using quantitative interference microscopy. The juvenoid fenoxycarb, a phenox
A method is described for the preparation of metabolically active and hormone-sensitive dispersed cells from fat body of Locusta migratoria and their subsequent use in a filtration plate assay. This assay measures the uptake of radiolabelled acetate into the cells, and the use of dispersed cells red
The juvenile hormone binding protein in Locusta migratoria i s a very high density lipoprotein of M, = 566,000. It contains 15% lipid and i s composed of six seemingly identical subunits of M, = 77,000. It is a minor protein, constituting I-2% of the total hemolymph proteins. Its concentration fluct