phosphagen


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phos·pha·gen

(fos'fă-jen),
Energy-rich guanidinium or amidine phosphate, serving as an energy store in muscle and brain; for example, phosphocreatine in mammals, phosphoarginine in invertebrates. Other phosphagens include phosphoagmatine, phosphoglycocyamine, and phospholombricine.

phosphagen

(fŏs′fă-jĕn)
Several chemicals, including phosphocreatine, that release energy when split. They are high-energy phosphate compounds.

phosphagen

a type of chemical found in the muscles of all animals, whose function is to pass on high-energy phosphate to ADP to form ATP. Phosphagens thus act as energy-storage molecules and are especially useful when cellular respiration is not providing sufficient ATP molecules, for example when sudden muscular activity takes place. Phosphagens are of two types: creatine phosphate found in vertebrates and echinoderms, and arginine phosphate found in many other invertebrates.
References in periodicals archive ?
And it may be amplified when the exercise hits all three metabolic energy systems: phosphagen, glycolytic and oxidative.
Anaerobic capacity is identified with the quantity of total energy because of the combination of anaerobic gliosis and phosphagen system (Rodgers,1990).
In addition to glycogen, a second short burst of energy for high intensity exercise can be obtained via the phosphagen pathway (ATP-phosphocreatine system), which allows anaerobic activities lasting up to 10 seconds at maximal exercise intensity [8, 9].
It is well established that, the postmortem energy metabolism or glycolysis (lactate) in muscle is highly relevant to the ultimate meat quality, and the muscle glycolytic flux early postmortem is mainly related to the phosphagen system and glycolytic enzymes activities [17].
Similar neural (e.g., nerve conduction velocity), muscle (e.g., type of recruited muscle fibers), and physiological aspects (e.g., the phosphagen pathway energy predominance) between sprints and jumps led to the assumption that these motor actions are highly related to each other in professional soccer players (13,18).
Usually when the heart needs energy, creatine phosphate (CP), an energy storage phosphagen, and adenosine diphosphate (ADP) will quickly be converted to adenosine triphosphate (ATP) and creatine, thus CP/ATP is commonly used as a measure of energy balance standards.
The physiological requirements of bowling reveal that the muscle activity required is fuelled mainly by the phosphagen breakdown system (13).
Energy requirements for short-term maximal exercises are mostly obtained through the anaerobic glycolysis and phosphagen systems (9).
Power performance is highly dependent on the phosphagen energy system, which requires 4 min for replenishment after an intense exercise set (Harris et al., 1976).
a depletion of acetylcholine, phosphagen, and glycogen.
The significant activation of the glycolytic pathway can be explained by the effort/pause ratio of 6:1 (effort: 117 s (65-150 s), pause: 20 [+ or -] 14 s) noted in this study, since the brief periods of pause are insufficient to fully restore the phosphagen system [36].
(128) In fact, a temporary decrease in the content of ATP as well as that of phosphagen has been observed immediately after dilution.