What is the metabolic process?
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It is the organic processes (in a cell or organism) that are necessary for life.
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The starting substances in respiration are a sugar (usually glucose) and oxygen.  The sugar first goes through glycolysis , which breaks it down into 2 pyruvates, 2 ATP, and  2 NADH. Then the 2 pyruvates go into the Krebs cycle (TCA cycle) and more NADH are made, plus 2 GTP.  Then all of the reducing power enters the electron transport chain where electron are transferred to oxygen to make H2O and ATP at the end of the respiration pathway.  The carbons in the glucose are converted into CO2.
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The citric acid cycle (also known as the tricarboxylic acid cycle, the TCA cycle, or the Krebs cycle) is a series of chemical reactions of central importance in all living cells that utilize oxygen as part of cellular respiration. In aerobic organisms, the citric acid cycle is part of a metabolic pathway involved in the chemical conversion of carbohydrates, fats and proteins into carbon dioxide and water to generate a form of usable energy. It is the second of three metabolic pathways that are involved in fuel molecule catabolism and ATP production, the other two being glycolysis and oxidative phosphorylation.  Check out the link below for more information.
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6 classes of nutrients: carbohydrates, proteins, fats, vitamins, minerals, water. See website http://www.runningplanet.com/articles/article_detail.asp?article_id=440\n\nGlucose metabolism is called glycolysis- see this website: http://science.nhmccd.edu/biol/glylysis/glylysis.html
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Glycolysis -- Cytoplasm\nKrebs Cycle(TCA) -- Matrix\nETS -- INNER membrane \nThe Krebs cycle, also called the citric acid cycle, is a fundamental metabolic pathway involving eight enzymes essential for energy production through aerobic respiration, and, like glycolysis, arose early in evolution. This pathway is also an important source of biosynthetic building blocks used in gluconeogenesis, amino acid biosynthesis, and fatty acid biosynthesis. The Krebs cycle takes place in mitochondria where it oxidizes acetyl-CoA, releasing carbon dioxide and extracting energy primarily as the reduced high-energy electron carriers NADH and FADH2. NADH and FADH2 transfer chemical energy from metabolic intermediates to the electron transport chain to create a different form of energy, a gradient of protons across the inner mitochondrial membrane. The energy of the proton gradient in turn drives synthesis of the high-energy phosphate bonds in ATP, the common energy currency of the cell used to drive a huge variety of reactions and processes. An acetyl-CoA molecule (2 carbons) enters the cycle when citrate synthase condenses it with oxaloacetate (4 carbons) to create citrate (6 carbons). One source of the acetyl-CoA that enters the Krebs cycle is the conversion of pyruvate from glycolysis to acetyl-CoA by pyruvate dehydrogenase. Acetyl-CoA is a key metabolic junction, derived not only from glycolysis but also from the oxidation of fatty acids.
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glycolysis is the process by which the glucose made in photosynthesis is broken down.\n\nIt takes place in the cells cytoplasm.\n\nUses glucose(sugar) and oxygen\n\nMakes carbon dioxide and water
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That is such a huge question, no wonder everyone avoided it... Ultimately all energy comes from metabolism and you can find out more about this in wikipedia but, be warned, there is a lot of information there.\n\nBut in a nutshell sugars and fats are proken down in the body to form ATP, and that drives all of the energy requiring reactions in your body.
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i assume "respiration" in your context refer to cellular respiration..\n\ncellular respiration in simple terms breaks down glucose and produce energy in forms of adenosine triphosphates.(ATPs). ATPs are the energy currency in the body and the breakdown of ATPs provide the energy needed for other metabolic processes, including digestion. Looking at it another way, digestion of complex nutrients like carbohydrates produces glucose, which is the respiratory substrate..\n\nDiffusion - oxygen required for aerobic respiration enters individual cells by diffusion. Waste products of aerobic respiration such as co2 leave the cells by diffusion into the bloodstream.  in general, diffusion is a passive process which does not require energy from ATPs, be it facilitated diffusion or simple diffusion, both are exergonic processes.\n\nthe circulatory system would carry the materials needed for aerobic respiration, eg oxygen and glucose to the individual cells, oxygen in form of oxyhaemoglobin in red blood cells. The circulatory system also carries the waste products, eg co2 away for excretion. \nThe circulatory system requires the pump, i.e. the heart to work, and the cardiac muscles require ATPs from respiration for contraction.\n\nhope u can see that they are all interrelated now..=)
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A metabolite is any molecule that is produced in a metabolic pathway carried out in living cells, starting with a particular substrate and driven by some number of enzymes essential to completion of the pathway.  For example, the complete metabolism of the glucose molecule is driven by a large number of critical enzymes and coenzymes that produce a number of metabolites in the pathway leading to the end products, water, carbon dioxide, and ATP (the cell's chemical "money").\n\nWhen you speak of metabolite 1 and metabolite 2 you are probably referring to primary and secondary metabolites.  Primary metabolites are molecules that are essential to the normal growth, development, and reproduction of the organism.  Secondary metabolites may also have important functions, but are not necessarily essential.  Examples of secondary metabolites are pigment molecules in plants and animals and the substances produced by various fungi that act as antibiotics.\n\nAll of the biochemical reactions that take place in living cells make up the cell's metabolism.  In some pathways, described as catabolic, large molecules are subdivided into smaller ones, usually with the release of energy stored in the large molecule (e.g. glucose).  In other pathways, called anabolic, smaller molecules are combined to form larger ones (e.g. the formation of functional proteins from a directed sequence of their constituent amino acids.\n\nAll chemicals that enter the human body as drugs or environmental contaminants are by definition not strictly necessary for the normal function of the body.  Such chemicals may have direct effects on the body's normal physiology without any metabolic conversion.  The most familiar example of such a chemical might be ethanol, the effects of which are known to anyone who's ever taken a drink.  Other drugs and chemicals may also have direct active effects.  On the other hand, many drugs and chemicals must be converted into an active form before they can have a  physiological effect.  For example, the carcinogen vinyl chloride must be converted into chloroethylene oxide and chloroacetaldehyde, which have the capacity to bind to and alter nuclear DNA, for the carcinogenic effect to occur.\n\nConversion of "foreign" parent molecules into active or inactive metabolites takes place in primarily in the liver.  Liver cells contain a vast array of enzyme systems which have apparently evolved with our species to protect us from the harmful effects of potentially toxic chemicals in our food and in the general environment.  The primary effect of these enzyme systems, such as the cytochrome P450 system, is to convert potentially toxic chemicals into relatively harmless metabolites, which are then frequently conjugated with another molecule, such as glucuronic acid, making it easier for the body to excrete the metabolites via the urine.  Again, sometimes the metabolites produced by one of these enzyme systems may be more toxic than the parent molecule; or the parent molecule given as a medication does not become active until it has been processed by a liver enzyme system.  Ethanol is another example here; one of its metabolites, acetaldehyde, is more toxic than the parent alcohol molecule.  Usually acetaldehyde is rapidly converted to carbon dioxide in water; many East Asian people are deficient in the enzymes needed to process acetaldehyde, and so have a much more limited tolerance for alcohol than non-Asians.\n\nOne final note:  it is usually the products of metabolism of  many drugs that may be detected in a person's urine.  This is true for most illicit drugs and also for tobacco.  Each drug produces a characteristic metabolite or metabolites that are present in the urine for some period of time after ingestion of the drug.
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Cellular respiration : carbon dioxide
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In simplest terms, photosynthesis is an anabolic pathway and uses light energy to generate ATP which in turn is used for biosynthesis to make glucose storing the energy derived as glucose. It also consumes CO2 and produces O2. While respiration is a catabolic pathway deriving energy from complete metabolism of glucose to CO2 and water using oxygen in the process.
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* The process begins with the oxidation of pyruvate, producing one CO2, and one acetyl-CoA.\n    * Acetyl-CoA reacts with the four carbon carboxylic acid, oxaloacetate--to form the six carbon carboxylic acid, citrate.\n    * Through a series of reactions citrate is converted back to oxaloacetate. This cycle produces 2 CO2 and consumes 3 NAD+, producing 3NADH and 3H+.\n    * It consumes 3 H2O and consumes one FAD, producing one FADH+.\n    * 1st turn end= 1 ATP, 3 NADH, 1 FADH2\n    * Since there are two molecules of Pyruvic acid to deal with, the cycle turns once more.\n    * The complete end result= 2 ATP, 6 NADH, 2 FADH2
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fermentation is the process by which some types of microorganisms (like yiest) use monosacchaide (like glucose) as nutrint and porduce metabolite and CO2  by oxidising it partially and release partial energy.\nthe diff between glycolysis and fermentation is that -----\nin glycolysis glucose is fully oxidised and produce complete energy wich is greater than energy released in fermentation. moreover in fermentation carbohydrate is partially oxidised
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Glycolysis, Glucose is imported into a cell and undergoes several structural changes before it becomes pyruvate which is the actual chemical we respire.\n\nGlucose-glucose6phosphate-fructose6phosphate-fructose 1,6 bisphosphate-2 x pyruvates
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glycolysis the step just before cellular respiration
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Kreb cycle and glycolysis - is what I initially answered\n\nHowever, if it is a standard test/textbook question the questioner is asking, then the answer is probably going to be 2 different mechanisms/pathways. It probably is going to be AEROBIC and ANAEROBIC metabolism.
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As Beare85 said, the matter comes in as nutrients or food. Metabolism consists a series of reactions that happens in the body and in cells, taking in food (potato, beef and so on), brakes them down into the smallest biological molecules (particles such as proteins, carbohydrates, fat, and other minerals and vita mines, while storing the energy of those bonds), then uses them as building blocks for their functions. In the body, a lot of the breaking down happens in the digestive system, and is spread through the body in the blood. Cells absorb nitriente mostly as building blocks already. Cells are mostly proteins, lipids (fat) and water. It all comes from food.