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Topic: Aerobic metabolism


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In the News (Sun 6 Dec 09)

  
  Muscle metabolism: aerobic vs. anaerobic
In photomicrographs of stained aerobic and anaerobic cells abutted against each other and with a capillary in the corridor between them, the mitochondria of the aerobic fibers are seen bunched near the capillary like moths around a flame, while the anaerobic fiber shows no such activity.
The mitochondria are naturally at the periphery of the aerobic fiber but are spread in the interior of the anaerobic fiber.
Aerobic fibers use large adenosine molecules as energy transporters, with AMP moving out to the mitochondria to be recharged to ATP, then lumbering back to the interior to activate calcium ion release.
www.chiroweb.com /archives/18/07/06.html   (1315 words)

  
 Metabolism and your basal metabolic rate
Metabolism is the number of calories that you burn at any given moment.
Your metabolism burns more calories while you are active then when you
When you miss meals or have long periods between meals, your metabolism rate slows down because it thinks you are starving yourself.
www.bodypumpinc.com /metabolism.html   (174 words)

  
 Chemistry, metabolism, and intelligence. A unit of: Using science fiction to study the evolution of intelligence
Metabolism is the term for a series of chemical reactions that provide energy in a form the organism can use for its own purposes: repairing cells, excreting wastes, making new cells, and reproducing.
The central element of aerobic metabolism, and the reason it provides so much more energy, is a series of reactions in which an electron bounces down a chain of molecules until it reaches a final electron acceptor that is then excreted.
In aerobic metabolism, hydrogen is the electron donor at the beginning of the process, and oxygen is the electron acceptor at the end.
www.molvray.com /sf/exobio/chem_metab.htm   (1900 words)

  
 Aerobic vs. Anaerobic: What is The Difference? :: Provided by MyFoodDiary.com
The problem with the terms "aerobic" and "anaerobic" when applied to exercise is that we actually never switch from total aerobic to total anaerobic metabolic conditions.
Consequently, it is best to view the terms aerobic and anaerobic as transitions in metabolism, where the proportion between aerobic and anaerobic metabolism changes with changes in exercise intensity.
Aerobic exercise tends to be less stressful to muscles, joints, and your heart, which may be important for individuals with arthritis, heart disease, or high blood pressure.
www.myfooddiary.com /resources/ask_the_expert/aerobic_vs_anaerobic.asp   (786 words)

  
 Sect. 2, Ch. 4: Sources of ATP: Aerobic Metabolism   (Site not responding. Last check: 2007-09-17)
Aerobic (oxidative) metabolism takes pyruvate from the glycolytic pathway and, in the presence of oxygen, produces a net total of 36 ATP per glucose molecule.
Not only is aerobic metabolism far more efficient in producing ATP, but its by-products are water and CO Water is, of course, innocuous.
A disadvantage of aerobic metabolism is that it requires adequate blood circulation to deliver sufficient quantities of oxygen to the muscle cells, and to remove CO rapidly from those cells.
www.lib.mcg.edu /edu/eshuphysio/program/section2/2ch4/aerobic.htm   (123 words)

  
 [No title]
In the human body, energy metabolism can be categorized into two basic types: (1) aerobic metabolism, which catabolizes energy substrates with the utilization of oxygen and, (2) anaerobic metabolism, which does not require oxygen for the catabolism of energy substrates.
The contribution of anaerobic and aerobic metabolism is dependent on the duration and intensity of the activity.
Aerobic Metabolism During Prolonged Exercise Depending on the intensity of exercise, once a steady-state VO2 is attained, it can usually be maintained for 10 to 30 minutes of continuous submaximal exercise.
www.sportsci.org /encyc/drafts/Dehydration_metabolism.doc   (2590 words)

  
 Memorial Hospital
In fact, aerobic is a type of metabolism, the process by which your body breaks down or "burns" stored fuel to create energy.
Aerobic exercise is the type that progressively places increased demands on the heart, causing it to grow stronger and more efficient.
Aerobic activities - walking, running, swimming, cycling, etc. - should be intensive enough to raise and sustain your heartbeat to a target heart range or THR (60 - 68% of its maximum capacity) for at least 20 - 30 minutes.
www.memorialhospital.org /Library/fitness/AerobicMetabolism.html   (475 words)

  
 Aerobic Fitness, Its meaning and significance
The term "aerobic" implies that the oxygen necessary to accomplish the work is taken up by the individual during the activity.
In aerobic work, oxygen is obtained from the air and is transferred from the lungs to the blood and then to the muscles via the circulatory system.
The main reason for this is that aerobic fitness is directly related to fat-free body weight, which consists mainly of the weight of muscles in the body, and on the average, males have a higher muscle mass than females.
www.aerobictest.com /fitnessInfo.htm   (432 words)

  
 CYCLING PERFORMANCE TIPS - basic physiology - cell energy metabolism
Aerobic metabolism, which requires oxygen (is oxygen dependent) refers to several different chemical processes in the cell, which produce ATP from all three food elements - carbohydrates, fats, and protein.
Aerobic pathways are used by the muscle cells for energy production (metabolizing both fats and carbohydrates as an energy source) up to exercise levels of approximately 50% VO2 max.
At that point (called the "crossover point"), although metabolism is still oxygen based (aerobic), it shifts towards glycogen as an energy source (and fat metabolism decreases).
www.cptips.com /bscphys.htm   (1786 words)

  
 Glycolysis
The first step in the metabolism of digestible carbohydrate is the conversion of the higher polymers to simpler, soluble forms that can be transported across the intestinal wall and delivered to the tissues.
The metabolic result of the phosphorylation of the bifunctional enzyme is that allosteric stimulation of PFK-1 ceases, allosteric inhibition of F-1,6-BPase is eliminated, and net flow of fructose through these two enzymes is gluconeogenic, producing F6P and eventually glucose.
Thus, the ability of an individual to metabolize ethanol is dependent upon the capacity of hepatocytes to carry out eother of these 2 shuttles, which in turn is affected by the rate of the TCA cycle in the mitochondria whose rate of function is being impacted by the NADH produced by the AcDH reaction.
web.indstate.edu /thcme/mwking/glycolysis.html   (4616 words)

  
 BioCurrents Research Center : Metabolism Research
Aerobic metabolism depends on oxygen and is a hallmark of mammalian cells where this is the primary mechanism of energy production.
Aerobic respiration is, however, a most dangerous activity, inevitably generating significant amounts of free radicals, which, if unregulated, can cause extensive damage within cells, targeting such structures as membranes and DNA.
Metabolic processes, located in the glycolytic pathway and Krebs cycle, can also play regulatory roles in cell function as is proposed for the secretion of insulin from pancreatic beta-cells.
www.mbl.edu /labs/BioCurrents/metabolism.html   (666 words)

  
 Energy Metabolism -- Encylopedic Reference of Parasitology
Aerobic generation of energy is defined as the complete oxidation of substrates to carbon dioxide and water via the combined action of the tricarboxylic acid (TCA) cycle and
In the energy metabolism of endoparasites, several biochemical reactions exist which have either no parallel in other eukaryotes or are a result of a modification of rather universal pathways, but which usually do not have a function in energy generation.
The aerobic metabolism of free-living and larval stages is shown in open arrows and the anaerobic fermentation pathways of adults in closed arrows.
parasitology.informatik.uni-wuerzburg.de /login/n/h/0457.html   (7335 words)

  
 Metabolism, Book Excerpt, A Natural Guide to Pregnancy and Postpartum Health-Chapter 3, Sound Formulas - Pregnancy ...   (Site not responding. Last check: 2007-09-17)
Once all of this has taken place, metabolic waste, in the form of carbon dioxide and water, is all that is left of the fuel that started out as (hopefully) a nutritious meal.
Aerobic energy production is the slow-burning counterpart to anaerobic energy production -- the big logs on the fire that take a little longer to catch but that last for hours.
The conditions are right for aerobic metabolism when all of the nutrients needed for the citric acid cycle and electron transport chain are readily available.
www.pregnancyrecovery.com /metabolism.cfm   (2075 words)

  
 Aerobic Exercises For Bodybuilders
Aerobics is an integral part of the bodybuilding lifestyle; whether in circuit training, fun cross-training activities, at home or in the cardio area of your gym, on machines or in the wide-open spaces.
Sprinting may he anaerobic, while marathon running is aerobic, but when long-distance runners sprint for the finish line, they’re activating their anaerobic metabolism.
In aerobic terms, the zone is that area of intensity that most people should work in to maximize the benefits of their workouts.
www.illpumpyouup.com /articles/aerobic-exercises-for-bodybuilders.htm   (1970 words)

  
 Aerobic vs. Anaerobic Metabolism
Aerobic metabolism, also known as cellular respiration or oxidative metabolism, requires oxygen to convert energy-rich molecules such as glucose into energy.
This type of metabolism can be a huge benefit since the body can use its stored sugar and fat to burn for more energy.
Aerobic metabolism converts the three basic food elements: carbohydrates, fat, and protein into Adenosine triphosphate.
members.shaw.ca /mystic_mars/scifairsite/html/aerobic.html   (254 words)

  
 Conditioning for MMA
And then establish how much of that endurance is derived from aerobic metabolism, and how much from anaerobic metabolism.  For an intensive loading period of 3-5 minutes duration, roughly half of the energy is supplied by anaerobic metabolism and half from aerobic metabolism.
Does this mean that one should forego aerobic training altogether?  There is no clear consensus among the experts, though many do advocate the developing of an "aerobic base" particularly in the preparatory period of training, as appropriate aerobic training can improve circulatory processes and facilitate recovery.
How then to develop endurance for the ring?  For many years, research has shown that development of endurance is associated with the functional specialization of the skeletal muscles, particularly enhancement of their strength and ability to use oxygen, rather than improvement of cardio respiratory ability.
www.veloforce.net /Conditioningfighter.html   (602 words)

  
 Cellular respiration - Wikipedia, the free encyclopedia
Aerobic metabolism is more efficient than anaerobic metabolism.
Glycolysis is not a metabolic pathway that is found in the cytoplasm of cells in all living organisms and requires oxygen.
In the absence of oxygen, pyruvate is not metabolized by cellular respiration but undergoes a process of fermentation.
en.wikipedia.org /wiki/Aerobic_metabolism   (1129 words)

  
 What is the Metabolism and how can you increase, speed up or boost your metabolism?   (Site not responding. Last check: 2007-09-17)
The virtue of exercise is that it increases or boosts your metabolism by its effect on muscle cells throughout the body.
The key to keeping your metabolism from decreasing from decade to decade is to keep exercising, and make sure you include resistance training to keep up your muscle mass.
In the case of resistance training, the increased FFM burns maybe 50 more calories a day, and the raised metabolism from aerobic training nets an extra 25 to 30 (this, of course, is not counting the calories burned during the activities themselves).
www.aboutaerobics.com /aerobic-metabolism.html   (1109 words)

  
 Letters from Terra - Biochemistry - Amino Acid metabolism
The carbons skeletons of all of these disparate and diverse compounds are derived, universally throughout life on this planet, from glycolytic intermediates, metabolites of the Krebs cycle and the Pentose phosphate pathway, and in the case of histidine from nucleotide (purine) metabolism.
All the ingenuity of the basic metabolic pathways of carbohydrates and fatty acids has been harnessed to yield a spectrum of protein components; common motifs are mixed and recombined, defined chemistry is applied to novel substartes, and echoes of each pathway reverberate throughout the whole system.
The metabolism of the amino acids is in itself another basis for more complex or specialised reactions, utilising the scemata of these pathways in the same way that the reactions characterised below employ the other metabolic pathways.
myweb.tiscali.co.uk /l42emmings/Biochem/AA_Metabolism.htm   (726 words)

  
 Las Cruces Fire Department :: Las Cruces, New Mexico
In aerobic metabolism, the body uses oxygen to burn glycogen and fat stores for fuel.
Aerobic training, once it is over, causes a person to feel much better thanks to the release of mood-enhancing beta-endorphins.
Some popular and very effective aerobic activities in Las Cruces are running, biking, swimming, skating, circuit training, aerobic classes, and using stationary aerobic equipment (treadmills, stair climbers, etc.).
www.las-cruces.org /fire/aerobic_training.html   (252 words)

  
 Biological Effects of Fasting and Caloric Restriction on Lipids Metabolism
These changes may be due to omitting at least one meal when the body was particularly metabolically active and possibly had a low blood viscosity level at the same time.
These are the key metabolic abnormalities of metabolic syndrome, a problem of epidemic proportions in the United States.
The other major need is to bring the technology for the analysis of multiple metabolic "phenotypes" up to the level of sophistication of the instrumentation used, for example, in gene science or in structural biology.
www.anti-aging-guide.com /33lipidsmetabolism.php   (3738 words)

  
 I. Overview of Aerobic Metabolism.   (Site not responding. Last check: 2007-09-17)
The last step of aerobic metabolism is the conversion of energy from electron transport into the high-energy phosphoryl bond of ATP.
Thus part of the metabolic load of red blood cells is carried by the liver.
This metabolic reprogramming is orchestrated by the peptide hormone glucagon which directs protein phosphorylation and indirectly alters concentrations of the allosteric regulators acetyl CoA and fructose 2,6-bisphosphate.
cmgm.stanford.edu /biochem200/am_syl.html   (5651 words)

  
 [No title]
Anaerobic metabolism is used to produce intense power for a short period of time.
Aerobic metabolism requires oxygen, thus it primarily occurs at low and moderate rates of activity.
Aerobic metabolism may use carbohydrates, triglycerides and protein for energy.
www.utc.edu /Course/HECO135/Metabolism.html   (320 words)

  
 Production of a Polyunsaturated Isoprenoid Wax Ester during Aerobic Metabolism of Squalene by Marinobacter ...
Aerobic and anaerobic abiotic oxidation of squalene in the presence of hydroperoxides.
Aerobic and anaerobic metabolism of 6,10,14-trimethylpentadecan-2-one by a denitrifying bacterium isolated from marine sediments.
Aerobic bacterial metabolism of phytol in seawater: effect of particle association on an abiotic intermediate step and its biogeochemical consequences.
aem.asm.org /cgi/content/full/69/7/4167   (3403 words)

  
 Aerobic Microbial Mineralization of Dichloroethene as the Sole Carbon Substrate
Although aerobic cometabolism of DCE is well-established, this process is probably restricted to the fringe of contaminant plumes because readily oxidizable substrates and oxygen rarely co-occur within the core of mature contaminant plumes.
However, the fact that microorganisms can also utilize DCE as a sole carbon substrate to support metabolism suggests that DCE can be degraded as a primary substrate in microbial metabolism and that this process may contribute to the natural attenuation of DCE even under circumstances where aerobic cometabolism is not favored.
Aerobic microbial mineralization of dichloroethene as sole carbon substrate: Environmental Science and Technology, v.
toxics.usgs.gov /sites/solvents/aerobic_min_VC.html   (216 words)

  
 Metabolic Typing -- Oxygen and Anti-Oxidants
While it is true that certain infections, cancers and other adversities thrive in an anaerobic environment, it is not true that anaerobic is “bad” and that aerobic is “good” or that everyone should do whatever possible to increase oxygen and aerobic metabolism in the body.
A prolonged, out-of-control aerobic metabolism is undesirable since the result is unregulated free radical production, tissue destruction and accelerated tissue aging.
Since oxygen is classified through metabolic typing as a Catabolic, aerobic nutrient, oxygen therapies only add fuel to the fire in someone with a catabolic imbalance and can thus worsen rather than improve such conditions.
www.healthexcel.com /docs/_oxygen1.html   (966 words)

  
 Aerobic Metabolism II: Oxidative Phosphorylation and Oxidative Stress
Aerobic Metabolism II: Oxidative Phosphorylation and Oxidative Stress
), sometimes referred to as oxygen, is used by aerobic organisms as a terminal electron acceptor in energy generation.
The complete oxidation of a molecule of glucose results in the synthesis of 29.5 to 31 molecules of ATP, depending on whether the glycerol phosphate shuttle or the malate-aspartate shuttle transfers electrons from cytoplasmic NADH to the mitochondrial ETC.
highered.mcgraw-hill.com /sites/007231592x/student_view0/chapter10   (462 words)

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