Endothermy of organisms and subcellular mechanisms of thermogenesis

  title={Endothermy of organisms and subcellular mechanisms of thermogenesis},
  author={B. Niyazmetov and R. Akhmerov and K. Almatov and S. Mirzakulov and Uz Mirkhodjaev},
It is generally known that mammals and birds are warm-blooded, and they are able to maintain such a state is not only in comfort, but in low and high temperature conditions. These circumstances, in all probability, were the prerequisite for the development of ideas about the existence of an organism of warm-blooded special heat generating system. Currently, it was accumulated a lot of material in this direction, which shows that heat production is determined by subcellular specialized… Expand


Temperature, metabolic power and the evolution of endothermy
  • A. Clarke, H. Pörtner
  • Biology, Medicine
  • Biological reviews of the Cambridge Philosophical Society
  • 2010
The modified hypothesis requires that the rise in metabolic rate and the insulation necessary to retain metabolic heat arose early in the lineages leading to birds and mammals, and the metabolic status of pterosaurs remains unresolved. Expand
The temperature dependence of oxidative phosphorylation and of the activity of various enzyme systems in liver mitochondria from cold- and warm-blooded animals.
  • C. Smith
  • Biology, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
  • 1973
The temperature dependence over the range 5–25°C of State III respiration as well as succinoxidase and NADH oxidase activities is significantly less for fish than for mammalian or avian mitochondria, and the possible adaptive value is discussed. Expand
A comparison of activities of metabolic enzymes in lizards and rats.
  • A. F. Bennett
  • Biology, Medicine
  • Comparative biochemistry and physiology. B, Comparative biochemistry
  • 1972
Protein-specific activities of metabolically important enzymes were measured in liver and skeletal muscle homogenates from three species of lizards, Sauromalus hispidus and Dipsosaurus dorsalis and Varanus gouldii, and laboratory rats; however, the mitochondrial (aerobic) enzymes were approximately one-fifth as active in the reptiles. Expand
Comparison of the "mammal machine" and the "reptile machine": energy use and thyroid activity.
Thyroid activity was assessed in the reptile and mammal by measurement of thyroidal uptake and release of 125I and serum thyroxine concentration and all parameters indicated a greater thyroid activity in the mammal. Expand
Qualitative difference in mitochondria of endothermic and ectothermic animals
It is suggested that the significant difference in the value of ADP‐independent respiration of endo‐ and ectotherms is due to the existence in endotherms of a non‐coupled population of mitochondria which generates heat without preliminary synthesis of ATP. Expand
Thermal sensitivity of uncoupling protein expression in polar and temperate fish.
The results are indicative of a significant role of fish UCP in thermal adaptation of fish mitochondria in the temperature-dependent setting of energy turnover in animals (and their mitochondria). Expand
Substrate cycles in metabolic regulation and in heat generation.
The relationship between near-equilibrium reactions and substrate cycles is emphasized, since this provides a basis for the derivation of a function describing in precise quantitative terms the factors governing the amplification provided by substrate cycles in metabolic regulation. Expand
Metabolic rate of the insect brain in relation to body size and phylogeny
Abstract 1. 1. The respiratory rate of isolated brains from 36 different species of insects, belonging to 6 separate orders, was determined in order to ascertain whether or not poikilotherms exhibitExpand
Endothermy and activity in vertebrates.
Resting and maximal levels of oxygen consumption of endothermic vertebrates exceed those of ectotherms by an average of five- to tenfold. Endotherms have a much broader range of activity that can beExpand
The oxidation of added NADH by intact heart mitochondria
A NADH-oxidase which was destroyed upon ageing of the mitochondria and which was highly sensitive to the normal respiratory chain inhibitors is described, which possesses some of the characteristics which might be expected from a cytoplasmicmitochondrial NADh-oxidsase working in Go. Expand