BIO-EnergetiKa, Tremelo, Brabant, Belgium. likes. Internationale Energetische Gezondheidsbeurs Bioenergetika. Slide 2b. T. • vzájemné přeměny různých druhů energie. • směřování fyzikálních a chemických pochodů měřítko samovolnosti ( uskutečnitelnosti. Close. Keyword [unauthorized form]. Source: bibliografické databáze. Main Heading. bioenergetika. Record number. _UND°SUB Display format. standard.

Author: Arashirn Yokora
Country: Laos
Language: English (Spanish)
Genre: Literature
Published (Last): 10 April 2004
Pages: 334
PDF File Size: 1.91 Mb
ePub File Size: 16.71 Mb
ISBN: 470-6-30003-732-4
Downloads: 12387
Price: Free* [*Free Regsitration Required]
Uploader: Malalar

ATP can be synthesized from a variety of biochemical precursors. Experiments in the s and s showed that lesions of the lateral hypothalamus LH reduced food intake; hence, the normal role of this brain area is to stimulate feeding and decrease energy utilization.

An emerging concept in the neurobiology of food intake is that neurocircuits exist that bioenergetiia normally inhibited, but when activated in response to emergent or stressful stimuli they can override the homeostatic control of energy balance. Unfortunately, despite dramatic advances in the basic neurobiology of feeding, our understanding of the etiology of these conditions and our ability to intervene clinically remain limited. This article needs additional citations for verification.

The key point here was ‘flux coupling’, the cotransport of sodium and glucose in the apical membrane of the small intestinal epithelial cell. Crane in was the first to formulate the cotransport concept to explain active transport [7]. Biochemistry Biophysics Cell biology.

The production of stronger bonds allows release of usable energy. Half a century later bioenergftika idea has turned into one of the most studied of all transporter proteins SGLT1the sodium—glucose cotransporter.

The energy homeostasis system comprises neurons in the mediobasal hypothalamus and other brain areas 4 that are a part of a neurocircuit that regulates food intake in response bioenergwtika input from humoral signals that circulate at concentrations proportionate to body fat content Living organisms produce ATP from energy sources via oxidative phosphorylation.

Mitchell ‘s chemiosmotic theory of how protons in aqueous solution function in the production of ATP in cell organelles such bioenergetikaa mitochondria. One of the major triumphs of bioenergetics is Peter D. December Learn how and when to remove this template message.

TOP Related Posts  LITERARY SEXTS PDF

A Foundation for Clinical Neuroscience 2nd ed. Some organisms, such as autotrophscan acquire energy from sunlight through photosynthesis without needing to consume nutrients and break them down. Crane presented for the first time his discovery of the sodium-glucose cotransport as the mechanism for intestinal glucose absorption.

Bioenerbetika neurons are regulated by peripheral mediators that carry information about energy balance, including glucose, leptin, and ghrelin. In photosynthesis bioenergrtika, autotrophs produce ATP using light energy, whereas heterotrophs must consume organic compounds, mostly including carbohydratesfatsand proteins.

The bonds holding the molecules of nutrients together and in particular the bonds holding molecules of free oxygen together are relatively weak compared with the chemical bonds holding carbon dioxide and water together. Bioenergetics is a field in biochemistry and cell biology that concerns energy flow through living systems. Articles needing additional references from December All articles needing additional references Wikipedia articles with GND identifiers.

Bioenergetics is the part of biochemistry concerned with the energy involved in making and breaking of chemical bonds in the molecules found in biological organisms.

The regulation of energy balance involves the bioenergetikq coordination of food intake and energy expenditure. Yet discovery of the complex networks of neuropeptides and other neurotransmitters acting within the hypothalamus bioenergetikka other brain regions to regulate food intake and energy expenditure began in earnest in with the cloning of the leptin ob, for obesity gene.

For example, lithotrophs can oxidize minerals such as nitrates or forms of sulfursuch as elemental sulfur, sulfitesand hydrogen sulfide to produce ATP.

In AugustRobert K. Nature, 13 Accordingly, orexin plays a role in the regulation of energy homeostasis, reward, and perhaps more generally in emotion. Adenosine triphosphate ATP is the main “energy bioenergetikaa for organisms; the goal of metabolic and catabolic processes are to synthesize ATP from available starting materials from the environmentand to break- down ATP into adenosine diphosphate ADP and inorganic phosphate by utilizing it in biological processes.

TOP Related Posts  KOMPANIJSKO PRAVO PDF

Medvik: bioenergetika

Understanding how these circuits interact with the energy homeostasis system is fundamental to understanding the control of food intake and may bear on the pathogenesis of disorders at both ends of the body weight spectrum. Importantly, as a direct consequence of the First Law of Thermodynamicsautotrophs and heterotrophs participate in a universal metabolic network—by eating autotrophs plantsheterotrophs harness energy that was initially transformed by the plants during photosynthesis.

This page was last edited on 3 Februaryat Indeed, there is now explosive interest in basic feeding mechanisms given the epidemic proportions of obesity in our society, and the increased toll of the eating disorders, anorexia nervosa and bulimia.

In contrast, lesions of the medial hypothalamus, especially the ventromedial nucleus VMH but also the PVN and dorsomedial hypothalamic nucleus DMHincreased food intake; hence, the normal role bioenergetoka these regions is bioenergetiak suppress feeding and increase energy utilization.

From Wikipedia, the free encyclopedia. In a living organism, chemical bonds are broken and made as part of the exchange and transformation of energy. Other cellular sources of ATP such as glycolysis were understood first, but such processes for direct coupling of enzyme activity to ATP production are not the major source of useful chemical energy in most cells.

Bioenergetics

Please help improve this article by adding citations to reliable sources. Chemiosmotic coupling is the major energy producing process in most cells, being utilized in chloroplasts and several single celled organisms in addition to mitochondria. Freeman and Company,