PMID: 5893685Aug 1, 1965

The sarcoplasmic reticulum, the T system, and the motor terminals of slow and twitch muscle fibers in the garter snake

The Journal of Cell Biology
A Hess

Abstract

Twitch and slow muscle fibers, identified morphologically in the garter snake, have been examined in the electron microscope. The transverse tubular system and the sarcoplasmic reticulum are separate entities distinct from each other. In twitch fibers, the tubular system and the dilated sacs of the sarcoplasmic reticulum form triads at the level of junction of A and I bands. In the slow fibers, the sarcoplasmic reticulum is severely depleted in amount and the transverse tubular system is completely absent. The junctional folds of the postsynaptic membrane of the muscle fiber under an "en grappe" ending of a slow fiber are not so frequent or regular in occurrence or so wide or so long as under the "en plaque" ending of a twitch fiber. Some physiological implications of these differences in fine structure of twitch and slow fibers are discussed. The absence of the transverse tubular system and reduction in amount of sarcoplasmic reticulum, along with the consequent disposition of the fibrils, the occurrence of multiple nerve terminals, and the degree of complexity of the post junctional folds of the sarcolemma appear to be the morphological basis for the physiological reaction of slow muscle fibers.

References

Feb 1, 1961·The Journal of Biophysical and Biochemical Cytology·J H LUFT
Jun 1, 1962·The Journal of Cell Biology·J A FREEMAN, B O SPURLOCK
Sep 1, 1964·The Journal of Cell Biology·C FRANZINI-ARMSTRONG, K R PORTER
Dec 1, 1961·The Journal of Biophysical and Biochemical Cytology·G MILLONIG
Apr 1, 1962·The Journal of Cell Biology·L D PEACHEY, A F HUXLEY

Citations

Sep 1, 1967·The American Journal of Anatomy·M J Cohen, A Hess
Oct 1, 1971·The American Journal of Anatomy·D Seiden
Jan 1, 1973·Zeitschrift für Zellforschung und mikroskopische Anatomie·H Korneliussen, K Nicolaysen
Jan 1, 1968·Zeitschrift für Zellforschung und mikroskopische Anatomie·H Teräväinen
Jan 1, 1971·Zeitschrift für Zellforschung und mikroskopische Anatomie·W Kilarski, J Bigaj
Jan 1, 1970·Zeitschrift für Zellforschung und mikroskopische Anatomie·P R Flood
Jan 1, 1967·Zeitschrift für Zellforschung und mikroskopische Anatomie·W Kilarski
Jan 1, 1969·Zeitschrift für Zellforschung und mikroskopische Anatomie·H Teräväinen
Jan 1, 1968·Zeitschrift für Zellforschung und mikroskopische Anatomie·H Teräväinen
Jan 1, 1967·Zeitschrift für Zellforschung und mikroskopische Anatomie·H Hirano
Oct 1, 1971·Journal of Insect Physiology·J H Anstee
Jan 1, 1975·Progress in Neurobiology·U Proske, R M Ridge
Aug 1, 1975·Proceedings of the National Academy of Sciences of the United States of America·S J BurdenD Yoshikami
Jul 1, 1966·The Journal of Cell Biology·G HoyleB Walcott
Mar 1, 1967·The Journal of Cell Biology·R A Bergman
Aug 1, 1968·The Journal of Cell Biology·A C EsterhuizenJ D Lever
Aug 1, 1969·The Journal of Cell Biology·J Rosenbluth
Mar 1, 1971·The International Journal of the Addictions·I P James
Jan 1, 1972·The International Journal of the Addictions·H Cohen
May 1, 1967·The American Journal of Anatomy·L V Leak
Feb 12, 2009·Microscopy Research and Technique·Aracy A MotoyamaJosé R Kfoury
Nov 1, 1980·Journal of Ultrastructure Research·M S Forbes, N Sperelakis
Jul 28, 2016·BMC Neuroscience·Christine T Nguyen, Bryan A Stewart
Sep 1, 1968·The British Journal of Addiction to Alcohol and Other Drugs·M M Glatt
Sep 1, 1967·Canadian Journal of Zoology·S S Jahromi, H L Atwood

Related Concepts

Protoplasm
Electron Microscopy
Muscle
Myofilaments
Nerve Endings
Nerve-Muscle Preparation
Snakes

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