Navigation Links
Metabolism



Metabolism (from μεταβολισμος (metabolismos), the Greek word for "change"), is the biochemical modification of chemical compounds in living organisms and cells. This includes the biosynthesis of complex organic molecules (anabolism) and their breakdown (catabolism). Metabolism usually consists of sequences of enzymatic steps, also called metabolic pathways. The total metabolism are all biochemical processes of an organism. The cell metabolism includes all chemical processes in a cell.

Contents

Metabolic pathways

Important metabolic pathways are:

General pathways

Catabolism

Catabolic pathways that breakdown complex molecules into simple compounds:

Anabolism

Anabolic pathways that create building blocks and compounds from simple precursors:

Drug metabolism

Drug metabolism pathways, the modification or degradation of drugs 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:

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, making love, 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

External links


'"/>


(Date:10/30/2014)... A UT Arlington bioengineering professor has received a ... aims to regenerate cartilage tissue and reduce osteoarthritis ... the injection of microscaffolding made of biodegradable polymers., ... of the bioengineering department, said the research is ... injured on the battlefield., "We,ve found that if ...
(Date:10/30/2014)... North Carolina State University researchers have developed a suite ... between dogs and humans, which has applications in everything ... our pets. , "We,ve developed a platform for computer-mediated ... to new avenues for interpreting dogs, behavioral signals and ... Dr. David Roberts, an assistant professor of computer science ...
(Date:10/29/2014)... study of its kind to date, researchers have used ... the risk for autism. Joseph Buxbaum, Ph.D., Icahn School ... Daly, Ph.D., Broad Institute of Harvard and MIT, and ... affected children, parents and unrelated people. They identified changes ... the risk for autism spectrum disorder (ASD) – a ...
Breaking Biology News(10 mins):UTA researcher uses microscaffolding injections to mend cartilage, prevent osteoarthritis 2New tech aims to improve communication between dogs and humans 2
... German . , Pacific Grove (CA)/Leipzig. ... sequences and function of two proteins in mussels that ... proteins form part of an active, physiological barrier in ... from the Helmholtz Centre for Environmental Research (UFZ) in ...
... Calif., Oct. 8 Lee Shupp, executive VP,at ... evolving consumer,expectations and imaging technologies are leading to ... Future of Imaging Conference, to be,held Nov. 18-20 ... The,conference will explore the transformative impact of recent ...
... Valley Virus-001, reveals that it is unlike any other known ... designation as a separate genus "Senecavirus." The new study reveals ... golf ballone with uneven divets and raised spikesand the RNA ... like a whiffleball. "It is not at all like ...
Cached Biology News:What causes cell defenses to crumble? 2What causes cell defenses to crumble? 3Cheskin Added Value EVP Lee Shupp Discusses Evolving Dynamics of Consumers and Imaging Tech at 6Sight 2Scripps research team solves structure of 'beneficial' virus 2
Other biology definitionOther Tags