The tight junctions associated
with pavement cells have multiple strands
and are not characterized as leaky (Sardet et al.,
’79; Kawahara et al., ’82; Bartels, ’88). In the
hagfish and lamprey, communicating gap junctions
have been found between neighboring
pavement cells, and pavement cells and undifferentiated
cells, however, not with MRCs
(Bartels ’88; Bartels and Potter ’93, respectively).
The presence of communicating gap junctions is
significant because they allow the electrochemical
coupling of the cells of the epithelium which is
important in coordinating cell growth, differentiation,
and function. No studies have been undertaken
in elasmobranchs to specifically determine
the presence of gap junctions.
The tight junctions associatedwith pavement cells have multiple strandsand are not characterized as leaky (Sardet et al.,’79; Kawahara et al., ’82; Bartels, ’88). In thehagfish and lamprey, communicating gap junctionshave been found between neighboringpavement cells, and pavement cells and undifferentiatedcells, however, not with MRCs(Bartels ’88; Bartels and Potter ’93, respectively).The presence of communicating gap junctions issignificant because they allow the electrochemicalcoupling of the cells of the epithelium which isimportant in coordinating cell growth, differentiation,and function. No studies have been undertakenin elasmobranchs to specifically determinethe presence of gap junctions.
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