Muscle utilization

Skeletal muscle utilizes glucose as a fuel, forming both lactate and CO2. It stores glycogen as a fuel for its use in muscular contraction and synthesizes muscle protein from plasma amino acids. Muscle accounts for approximately 50% of body mass and consequently represents a considerable store of protein that can be drawn upon to supply amino acids for gluconeogenesis in starvation. 

Skeletal muscle utilizes and stores glucose in the fed state. 

Heart Muscle Utilizes Fatty Acids in Preference to Glucose to Fulfill Its Energy Needs Skeletal Muscle Can Function Aerobically or Anaerobically... 

At rest, skeletal muscle utilizes the catabolism of fatty acids and branched-chain amino acids to maintain cellular... 

The actuation principle of IPMCs is based on the electromechanically induced bending. At the same time, in nature, biological muscles utilize... 

There is a continuous release of non-esterified fatty acids from adipose tissue. In the fed state most of the fatty acids are taken up by the liver, re-esterified to form triacylglycerol and exported in VLDL (section 5.6.2.2). This apparently futile (and ATP-expensive) cycling between lipolysis in adipose tissue and re-esterification in the liver permits increased utilization of fatty acids as fuel in muscle by increasing the rate of fatty acid uptake into muscle without the need to increase the rate of lipolysis. As discussed in section 10.6, the extent to which muscle utilizes fatty acids is determined to a considerable extent by the intensity of physical activity, rather than by their availability. 

Insect muscle utilizes the Meyerhof sequence only as far as pyruvate, and the NADH produced during triosephosphate oxidation seems to be reoxidized by the reduction of dihydroxyacetone phosphate to glycerophosphate (Chance and Sacktor, 1958). The major sugar in the plasma is a,a-trehalose, a disaccharide of glucose, and it plays a major part in the glucose transport system of insects (Wyatt and Kalf, 1957). For a review of insect biochemistry, see Goodwin (1965). 

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