TY - JOUR
AU - NAGATA,, Sunao
AB - Abstract The Physiological characteristics, esp. the ion transport functions, of the frog skin have been studied extensivelyl)2) Recent advances in fixation and embedding media allow high resolution electron microscopy of this material3–8), throwing new light on the pioneer work of Ottoson and associates9). Cell junctions in the frog skin presumable play a passive role in the maintenance of electrochemical potential gradient by impeding back diffusion (leaks) along the intercellular spaces. From the comparative physiological point of view, we suggested that the cell junctions may contribute to the selectivity of permeability of the cations in the skin of amphibians5). The most intuitive evidence for the suggesion is as follows: skin potential of the toad is inversely proportional to the crystallographic ionic radius of the cation used, while the frog skin potential is observed almost strictly selective13) for Na+ and Li+ (K+ and other cations showed very small potentials). Cells in stratum corneum of the toad (Bufo vulgaris) showed degenerated appearance because of its strong cornification, in contrast to the less cornified structure of the cells in the frog skin14). Structure of the cornified cells and cation selectivity of newt skin showed intermediate state between the toad and the frog6). Thence, we have attempted to correlate their ultrastructure with ion transport functions, the present paper reports fine structure of the junctional complexes in the epidermis of frog. Preliminary communications concerning part of this work has already appeared3) 6). This content is only available as a PDF. © Oxford University Press
TI - Cell Junctions in the Frog Skin
JF - Journal of Electron Microscopy
DO - 10.1093/oxfordjournals.jmicro.a049591
DA - 1968-01-01
UR - https://www.deepdyve.com/lp/oxford-university-press/cell-junctions-in-the-frog-skin-bdp0ORKtAc
SP - 41
EP - 46
VL - 17
IS - 1
DP - DeepDyve
ER -