Evolution of Insect Flight Muscle Structure as Studied by Using X-ray Microbeams
نویسندگان
چکیده
منابع مشابه
Structure, function and evolution of insect flight muscle
Insects, the largest group of animals on the earth, owe their prosperity to their ability of flight and small body sizes. The ability of flight provided means for rapid translocation. The small body size allowed access to unutilized niches. By acquiring both features, however, insects faced a new problem: They were forced to beat their wings at enormous frequencies. Insects have overcome this p...
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The fine structure of fibrillar flight muscle of the mature adult beetle Tenebrio molitor is described. Although the very high frequency of contraction of fibrillar muscle has previously been in part accounted for as the result of mechanical specialization of the wing-bearing segment rather than of a correspondingly high rate of motor impulse supply, the problem of the nature of the pathway by ...
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Small insects drive their flight muscle at frequencies up to 1,000 Hz. This remarkable ability owes to the mechanism of stretch activation. However, it remains unknown as to what sarcomeric component senses the stretch and triggers the following force generation. Here we show that the earliest structural change after a step stretch is reflected in the blinking of the 111 and 201 reflections, as...
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Recent studies have demonstrated that nucleotide triphosphates, other than ATP,’ function in biological systems in a manner analogous to that of ATP. These purine and pyrimidine ribotides are now, known to serve as coenzymes in the biosynthesis and interconversion of hexose phosphates (l-3)) in the formation of phospholipides (4)) and as phosphate donors or acceptors in carboxylation reactions ...
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INTRODUCTION The constraint of constant volume for a contracting muscle cell implies a radial expansion that occurs during axial shortening will lead to increases in the radial spacing of the lattice of myofilaments. That change in filament spacing, in turn, can have a profound effect on the attachment rate of crossbridges [1]. At the same time, cross-bridges attaching to thin filaments and gen...
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ژورنال
عنوان ژورنال: Nihon Kessho Gakkaishi
سال: 2006
ISSN: 0369-4585,1884-5576
DOI: 10.5940/jcrsj.48.337