Metabolic Pathways are integrated.Justify.
Answers
Metabolism is the set of chemical rections that occur in a cell, which enable it to keep living, growing and dividing. Metabolic processes are usually classified as:
catabolism - obtaining energy and reducing power from nutrients.
anabolism - production of new cell components, usually through processes that require energy and reducing power obtained from nutrient catabolism.
There is a very large number of metabolic pathways. In humans, the most important metabolic pathways are:
glycolysis - glucose oxidation in order to obtain ATP
citric acid cycle (Krebs' cycle) - acetyl-CoA oxidation in order to obtain GTP and valuable intermediates.
oxidative phosphorylation - disposal of the electrons released by glycolysis and citric acid cycle. Much of the energy released in this process can be stored as ATP.
pentose phosphate pathway - synthesis of pentoses and release of the reducing power needed for anabolic reactions.
urea cycle - disposal of NH4+ in less toxic forms
fatty acid β-oxidation - fatty acids breakdown into acetyl-CoA, to be used by the Krebs' cycle.
gluconeogenesis - glucose synthesis from smaller percursors, to be used by the brain.