Which metabolic process is anaerobic

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Top Subjects. Our Company. Varsity Tutors. Privacy Policy. Terms of Use. Sign In. Email address: Your name: Feedback:. In the aerobic metabolic process, the human body uses glucose to produce adenosine triphosphate ATP molecules. ATP is what fuels your muscles. Anaerobic metabolism, which is used for vigorous muscle contraction, produces many fewer ATP molecules per glucose molecule, so it is much less efficient.

There is detailed chemistry involved in how the body produces energy for exercise. The body uses aerobic metabolism for energy throughout the day to fuel regular activity by the cells, muscles, and organs. This is why you have a basal metabolic rate , a level of calorie-burning needed just to maintain the normal body functions, apart from physical activity calories burned.

A living body is always burning some calories, even at rest. Aerobic metabolism is also why your lungs absorb oxygen to be carried by hemoglobin in the blood to your tissues.

The oxygen is used in aerobic metabolism to oxidize carbohydrates and the oxygen atoms end up attached to carbon in the carbon dioxide molecule that is excreted. The only byproducts of the process of aerobic metabolism of carbohydrates are carbon dioxide and water. Your body disposes of these by breathing, sweating, and urinating. Compared with anaerobic metabolism, which produces lactic acid as well, the byproducts of aerobic metabolism are easier to remove from the body. This means less muscle soreness after exercise with aerobic metabolism.

Your body is able to maintain a constant energy stream by breaking down carbohydrates and fats with aerobic metabolic processes. At a moderate-intensity level of exercise , you are breathing enough and your muscles' need for ATP is slow and steady enough that you can break down glycogen into glucose and mobilize stored fat to break down for energy. You can also take in carbohydrate that the body can use before all of the stores are depleted.

Athletes who get this wrong experience bonking or "hitting the wall. Aerobic exercises use large muscle groups to perform the same actions for at least 10 minutes at a time. This raises your heart rate and breath rate as your body delivers the oxygen needed to your muscles for aerobic metabolism.

This burns sugars and fats for energy. One of the easiest aerobic exercises is walking at a brisk pace where you may be breathing a little hard but still able to speak in full sentences. An aerobic walking workout of 30 minutes per day can provide the recommended level of physical activity to promote good health.

Running, cycling, rowing, swimming, cross-country skiing, and cardio exercise machines such as elliptical trainers, stair steppers, rowers, and ski machines can all provide an aerobic workout. You can also enjoy dancing as an aerobic activity. While yoga and tai chi use aerobic metabolism, they usually don't raise your heart rate enough to be considered moderate-intensity aerobic exercise.

If your goal is to lose weight through exercise , aerobic metabolism is your friend as it takes fat out of the fat cells and burns it to produce energy for the muscles.

It also burns up the available and stored sugars carbohydrates in your cells, so any excess won't be processed into fat. The food that you eat will replenish your available energy stores. If you don't eat more calories than you burn off, you won't store extra food calories as fat. The enzyme used in this reaction is lactate dehydrogenase LDH. The reaction can proceed in either direction, but the reaction from left to right is inhibited by acidic conditions.

Such lactic acid accumulation was once believed to cause muscle stiffness, fatigue, and soreness, although more recent research disputes this hypothesis. Once the lactic acid has been removed from the muscle and circulated to the liver, it can be reconverted into pyruvic acid and further catabolized for energy.

Another familiar fermentation process is alcohol fermentation, which produces ethanol, an alcohol. The use of alcohol fermentation can be traced back in history for thousands of years. The chemical reactions of alcoholic fermentation are the following Note: CO 2 does not participate in the second reaction :. Alcohol Fermentation : Fermentation of grape juice into wine produces CO2 as a byproduct.

Fermentation tanks have valves so that the pressure inside the tanks created by the carbon dioxide produced can be released. The first reaction is catalyzed by pyruvate decarboxylase, a cytoplasmic enzyme, with a coenzyme of thiamine pyrophosphate TPP, derived from vitamin B 1 and also called thiamine. A carboxyl group is removed from pyruvic acid, releasing carbon dioxide as a gas. The loss of carbon dioxide reduces the size of the molecule by one carbon, making acetaldehyde.

The fermentation of pyruvic acid by yeast produces the ethanol found in alcoholic beverages. Ethanol tolerance of yeast is variable, ranging from about 5 percent to 21 percent, depending on the yeast strain and environmental conditions. Without these pathways, that step would not occur and no ATP would be harvested from the breakdown of glucose.

Skip to main content Skip to table of contents. This service is more advanced with JavaScript available. Editors: Frank C. Contents Search. Anaerobic Metabolism. Authors Authors and affiliations James R. McDonald L.