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On the Presence of a Transverse System in Tunicate Muscle
Author(s) -
Bone Q.,
Ryan K. P.
Publication year - 1975
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1975.tb00103.x
Subject(s) - tadpole (physics) , biology , endoplasmic reticulum , tunicate , ultrastructure , anatomy , diad , triad (sociology) , myocyte , notochord , larva , microbiology and biotechnology , nuclear magnetic resonance , embryo , embryogenesis , botany , psychology , physics , particle physics , psychoanalysis , copolymer , polymer , ecology
Ultrastructural investigation of the caudal muscle cells in the tadpole larva of the ascidian Dendrodoa grossularia has shown that in this species, a transverse tubular system is present; diad and triad couplings are formed with the sarcoplasmic reticulum. Peripheral couplings of the sarcoplasmic reticulum are infrequent and have only been observed at the longitudinally apposed faces of the caudal muscle cells.