scholarly journals Role of Ca(2+) in excitation-contraction coupling in echinoderm muscle: comparison with role in other tissues

2001 ◽  
Vol 204 (5) ◽  
pp. 897-908 ◽  
Author(s):  
R.B. Hill
Keyword(s):  
Control Systems ◽  
Body Wall ◽  
Longitudinal Muscle ◽  
The Body ◽  
Excitation Contraction Coupling ◽  
Contraction Coupling ◽  
Collagenous Tissue

The longitudinal muscle of the body wall of Isostichopus badionotus may be considered a model for excitation-contraction coupling in echinoderm muscle. Other echinoderm muscles are reviewed by comparison with the model. Echinoderm muscle is also of interest as a model for ‘mutable collagenous tissue’; however, in that tissue, Ca(2+) has been proposed to function both in living control systems and in regulation of non-living interstitial substance.

Extracellular divalent cations in excitation–contraction coupling: hypertonic solution effects

1982 ◽  
Vol 60 (4) ◽  
pp. 440-445
Author(s):  
Isao Oota ◽  
Isao Kosaka ◽  
Torao Nagai ◽  
Hideyo Yabu
Keyword(s):  
Skeletal Muscle ◽  
Divalent Cations ◽  
Muscle Fibers ◽  
Hypertonic Solution ◽  
Excitation Contraction Coupling ◽  
Contraction Coupling ◽  
Skeletal Muscle Fibers ◽  
Membrane Bound

It is the purpose of this article to point out that the membrane-bound Ca plays an important role in excitation–contraction (E–C) coupling of skeletal muscle fibers and that other divalent cations are unable to substitute for this role of membrane-bound Ca.

Some Observations on the Role of the Body Wall of Acanthocephalus Ranae in Lipid Uptake

1968 ◽  
Vol 48 (1) ◽  
pp. 217-225
Author(s):  
R. A. HAMMOND
Keyword(s):  
Lipid Droplets ◽  
Body Wall ◽  
The Body ◽  
Lipid Uptake ◽  
Uptake Of Nutrients ◽  
Lipid Excretion

1. Acanthocephalus ranae has been found to take up glyceryl tri[oleate-9,10-3H] solely through the surface of the trunk. The proboscis and lemnisci play no part in the uptake of this material. The large amounts of lipid present in the latter organs may be evidence of their involvement in lipid excretion. 2. Fat-soluble dyes are taken up by the animal and accumulate in lipid droplets in the lemnisci and proboscis wall. It is suggested that such dyes do not enter the animal through the surface of the proboscis, as has been suggested previously, but through the surface of the trunk. 3. The structure of the acanthocephalan body wall is discussed in relation to the uptake of nutrients.

scholarly journals Dstac Regulates Excitation-Contraction Coupling in Drosophila Body Wall Muscles

2020 ◽  
Vol 11 ◽  
Author(s):  
I-Uen Hsu ◽  
Jeremy W. Linsley ◽  
Lilly E. Reid ◽  
Richard I. Hume ◽  
Ari Leflein ◽  
...  
Keyword(s):  
Body Wall ◽  
Excitation Contraction Coupling ◽  
Contraction Coupling ◽  
Body Wall Muscles

Excitation-contraction coupling in HFpEF versus HFrEF: Role of transverse-axial tubule system

2020 ◽  
Vol 140 ◽  
pp. 46
Author(s):  
Xin Yue ◽  
Peter Kilfoil ◽  
Rui Zhang ◽  
Stephan Aynaszyan ◽  
Yushun Zhang ◽  
...  
Keyword(s):  
Excitation Contraction Coupling ◽  
Contraction Coupling ◽  
Transverse Axial

scholarly journals Serotonin modulates muscle function in the medicinal leech Hirudo verbana

2011 ◽  
Vol 7 (6) ◽  
pp. 885-888 ◽  
Author(s):  
Shannon P. Gerry ◽  
David J. Ellerby
Keyword(s):  
Body Wall ◽  
Longitudinal Muscle ◽  
Force Production ◽  
Physiological Saline ◽  
The Body ◽  
Hirudo Verbana ◽  
Work Production ◽  
Large Length ◽  
Body Wall Muscles

The body wall muscles of sanguivorous leeches power mechanically diverse behaviours: suction feeding, crawling and swimming. These require longitudinal muscle to exert force over an extremely large length range, from 145 to 46 per cent of the mean segmental swimming length. Previous data, however, suggest that leech body wall muscle has limited capacity for force production when elongated. Serotonin (5-HT) alters the passive properties of the body wall and stimulates feeding. We hypothesized that 5-HT may also have a role in allowing force production in elongated muscle by changing the shape of the length–tension relationship (LTR). LTRs were measured from longitudinal muscle strips in vitro in physiological saline with and without the presence of 10 µM 5-HT. The LTR was much broader than previously measured for leech muscle. Rather than shifting the LTR, 5-HT reduced passive muscle tonus and increased active stress at all lengths. In addition to modulating leech behaviour and passive mechanical properties, 5-HT probably enhances muscle force and work production during locomotion and feeding.

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