ISSN:
1432-0878
Keywords:
Electron microscopy
;
Junctions
;
Smooth muscle
;
Echinodermata
;
Holothuria, Aspidochirotida
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary Electron microscopy reveals that sarcolemmata of adjacent muscle cells form pentalaminar junctions by fusion of apposed trilaminar double leaflet membranes. These junctions appear to be candidates for low resistance pathways between muscle fibers. The muscles depolarize slowly when bathed in solutions containing elevated concentrations of KCl, and the sucrose gap method can then be used to measure the potential difference between polarized and depolarized regions. Thus the junctions which we have observed may provide the structural basis for electrical transmission through the sucrose gap.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00204778
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