منابع مشابه
Junctional Complexes in Various Epithelia
The epithelia of a number of glands and cavitary organs of the rat and guinea pig have been surveyed, and in all cases investigated, a characteristic tripartite junctional complex has been found between adjacent cells. Although the complex differs in precise arrangement from one organ to another, it has been regularly encountered in the mucosal epithelia of the stomach, intestine, gall bladder,...
متن کاملThe intercellular junctional complexes of retinal pigment epithelia.
Previous studies of the retinal pigment epithelium have suggested that its cells are interconnected by typical arrays of intercellular junctions. Using both conventional and freezefracture electron microscopy, we have found on the contrary that pigment epithelial cells in a wide variety of vertebrates (goldfish, frog, newt, mudpuppy, turtle, chicken, mouse, cat, and monkey) in fact have unusual...
متن کاملPermeable Junctional Complexes
Ionic lanthanum has been used to study transepithelial ion permeation in in vitro rabbit gallbladder and intestine (ileum) by adding 1 mM La(3+) to only the mucosal bathing solution. Transepithelial fluid transport electrical potential differences (p.d.), and resistances were measured. During La(3+) treatment the gallbladder's rate of active solute-coupled fluid transport remained constant, the...
متن کاملDefining junctional complexes
here are four major types of cell–cell junctions in the polarized epithelial cells of vertebrates. Farquhar and Palade (1963) defined three of them. The history of cell–cell contacts goes all the way back to the 1830s. For much of the 19th century an intercellular cement was thought to surround and bind cells over their entire surface area. The opposing idea of specific sites of adhesion was, h...
متن کاملHigh-energy adhering junctional complexes or with mitochondrial coupling.
A variety of adhering junction is found in the ependyma of the domestic cat with a coupling of mitochondria. These are symmetrically situated (in mirror form) at both sides of the intercellular cleft, which always maintain the same separating distance, thereby leaving a limiting cellular space of a constant amplitude. The hypothesis is put forward that the energy (ATP), provided by the mitochon...
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ژورنال
عنوان ژورنال: Journal of Cell Biology
سال: 1963
ISSN: 1540-8140,0021-9525
DOI: 10.1083/jcb.17.2.375