scholarly journals On the question of the termination of motor nerves in the muscles of the heart of vertebrates

2020 ◽  
Vol VIII (4) ◽  
pp. 169-180
Author(s):  
A. E. Smirnov
Keyword(s):  
Striated Muscle ◽  
Muscle Fibers ◽  
Muscle Cells ◽  
Motor Nerves ◽  
Striated Muscle Fibers

Despite the significant literature on this issue, we still do not have its final resolution. Here, in brief features, is the main literary data related to this subject. A. Klliker in 1862, examining the nerves of the frog's heart, spoke in favor of their free ending on the muscle cells of the heart, which is most similar to the nerve ends on the striated muscle fibers.

scholarly journals The Ultrastructure of Myosin-Extracted Striated Muscle Fibers

1967 ◽  
Vol 7 (3) ◽  
pp. 499-504 ◽  
Author(s):  
BENJAMIN WALCOTT ◽  
ELLIS B. RIDGWAY
Keyword(s):  
Striated Muscle ◽  
Muscle Fibers ◽  
Striated Muscle Fibers

Morphological Studies of Fiber Types of Striated Muscle Fibers of the Cremaster in the Guinea Pig

1981 ◽  
Vol 111 (3) ◽  
pp. 240-246 ◽  
Author(s):  
Jesús G. Ninomiya ◽  
Olga M. Echeverría ◽  
Gerardo H. Vázquez-Nin
Keyword(s):  
Guinea Pig ◽  
Striated Muscle ◽  
Muscle Fibers ◽  
Fiber Types ◽  
Morphological Studies ◽  
Striated Muscle Fibers

Experimental Therapies in Renal Replacement: The Effect of Two Different Potassium Acetate-free Biofiltration Protocols on Striated Muscle Fibers

2007 ◽  
Vol 11 (5) ◽  
pp. 375-381 ◽  
Author(s):  
Giuseppe Coppolino ◽  
Davide Bolignano ◽  
Sergio Parisi ◽  
Emanuele Aloisi ◽  
Adolfo Romeo ◽  
...  
Keyword(s):  
Striated Muscle ◽  
Muscle Fibers ◽  
Potassium Acetate ◽  
Experimental Therapies ◽  
Striated Muscle Fibers

scholarly journals Polarization of Tryptophan Fluorescence from Single Striated Muscle Fibers

1972 ◽  
Vol 59 (1) ◽  
pp. 103-120 ◽  
Author(s):  
C. G. dos Remedios ◽  
R. G. C. Millikan ◽  
M. F. Morales
Keyword(s):  
Sarcomere Length ◽  
Striated Muscle ◽  
Muscle Fibers ◽  
Tryptophan Fluorescence ◽  
Thin Filaments ◽  
A Value ◽  
Striated Muscle Fibers ◽  
Types Of Muscle Fibers ◽  
Cross Bridges ◽  
Contraction And Relaxation

Instrumentation has been developed to detect rapidly the polarization of tryptophan fluorescence from single muscle fibers in rigor, relaxation, and contraction. The polarization parameter (P⊥) obtained by exiciting the muscle tryptophans with light polarized perpendicular to the long axis of the muscle fiber had a magnitude P⊥ (relaxation) > P⊥ (contraction) > P⊥ (rigor) for the three types of muscle fibers examined (glycerinated rabbit psoas, glycerinated dorsal longitudinal flight muscle of Lethocerus americanus, and live semitendinosus of Rana pipiens). P⊥ from single psoas fibers in rigor was found to increase as the sarcomere length increased but in relaxed fibers P⊥ was independent of sarcomere length. After rigor, pyrophosphate produced little or no change in P⊥, but following an adenosine triphosphate (ATP)-containing solution, pyrophosphate produced a value of P⊥ that fell between the contraction and relaxation values. Sinusoidal or square wave oscillations of the muscle of amplitude 0.5–2.0% of the sarcomere length and frequency 1, 2, or 5 Hz were applied in rigor when the myosin cross-bridges are considered to be firmly attached to the thin filaments. No significant changes in P⊥ were observed in either rigor or relaxation. The preceding results together with our present knowledge of tryptophan distribution in the contractile proteins has led us to the conclusion that the parameter P⊥ is a probe of the contractile state of myosin which is probably sensitive to the orientation of the myosin S1 subfragment.

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