Information AboutMetabolic |
| CATEGORIES ABOUT METABOLISM | |
| metabolismmetabolism | |
| biochemistry | |
| physiology | |
| cellular processes | |
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Metabolism (from μεταβολισμος ("metabolismos")) is the Biochemical modification of Chemical Compound s in Living Organism s and Cell s. This includes the Biosynthesis of complex Organic Molecule s ( Anabolism ) and their breakdown ( Catabolism ). Metabolism usually consists of sequences of Enzymatic steps, also called Metabolic Pathway s. The Total Metabolism are all biochemical processes of an organism. The Cell Metabolism includes all chemical processes in a cell. The term is derived from the Greek word for "change", or "overthrow" ( Etymonline )). METABOLIC PATHWAYS Important metabolic pathways are: General pathways Anabolism Anabolic pathways that create building blocks and compounds from simple precursors:
Drug metabolism Drug Metabolism pathways, the modification or degradation of Drug s and other Xenobiotic compounds through specialized enzyme systems: Nitrogen metabolism Nitrogen metabolism includes the pathways for turnover and Excretion of nitrogen in organisms as well as the biological processes of the Biogeochemical Nitrogen Cycle :
Other HISTORY The first controlled experiments in human metabolism were published by Santorio Santorio in 1614 in his book ''Ars de statica medecina'' that made him famous throughout Europe . He describes his long series of experiments in which he weighed himself in a chair suspended from a steelyard balance (see image), before and after eating, sleeping, working, sex, fasting, depriving from drinking, and excreting. He found that by far the greatest part of the food he took in was lost from the body through ''perspiratio insensibilis'' (insensible perspiration). SEE ALSO
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