Anerobic metabolism vs Aerobic metabolism?

Question

why is aerobic metabolism better at sustaining exercise than anaerobic metabolism.

Answer 1

During exercise, pyruvate will be converted into Acetyl-CoA under aerobic respiration and be converted to lactate under anaerobic respiration.

Lactic acid causes the muscle to feel tired and we would need to rest so that the lactic acid can be converted to other forms that would not cause the pain.

Under aerobic anabolism, there is no production of lactic acid, so we can sustain better.

Answer 2

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RE:
Anerobic metabolism vs Aerobic metabolism?
why is aerobic metabolism better at sustaining exercise than anaerobic metabolism.

Answer 3

Metabolism can be divided into: Anabolism and Catabolism. Anabolism includes all the processes by which new more complex compounds are assembled in the cell. Catabolism does the opposite.

Degrading compounds from their more complex structure, to the simplest molecules, i.e. catabolism, is also a way for the cell to obtain energy. This process is also known as oxidation. In oxidation chemical substances lose electrons, thus releasing energy. This happens when iron gets rusty, but the energy is lost in the reaction of forming the rust itself.

In the cell, however, the energy is used to form ATP. ATP is a substance that is used everywhere in the cell, where energy is needed: chemical reactions, structure synthesis, movement, etc.

As the name indicates, oxidation needs oxygen, or at least a chemical substance that will take the electrons. When oxygen is available, a complete oxidation occurs. That means the substance used as source of energy (most likely glucose) is completely broken down and stripped of all the energy the cell can take from it.

When oxygen is not available, the oxidation is incomplete. The replacements for oxygen the cell can provide are not as efficient as oxygen itself, and for that reason, some of the energy is not obtained by the cell.

Aerobic metabolism takes place of course in the presence of oxygen, i.e. oxidation is complete. Anaerobic metabolism, takes place in the absence or lack of oxygen, i.e. oxidation is incomplete. Because of this, anaerobic metabolism is less efficient than aerobic metabolism.

Answer 4

Aerobic metabolism requires energy, which is very important, because our body needs oxygen to help produce ATP through the process of cellular respiration. ATP is basically our energy that is given off to our cells. W/o it our cells will not have energy to function, which means we want have energy to carry out our life activities. In biology form, in aerobic metabolism our cells produce 34 ATP's, in anaerobic metabolism our cells produce only 4 ATP's. If you think about it that's a big difference.

Answer 5

Aerobic respiration- in presence of O2
the NADPH+H+ is oxidised through electron transport system to produse ATP , the assimilatory power

Anaerobic--absence of O2
NADPH+H+ is oxidised directly while forming alohol to ATP without electron transport

Answer 6

Aerobic is.. due to more energy being provided to your cells. Like when you run.

Weight lifting is more anerobic, where less oxygen is provided to the cells, and latic acid builds up due to that.

Answer 7

its simple......!!
durin anerobic resp. lactic acid is formed(or ethyl alcohol as in yeast's case).....so dis means dat d oxidation is not complete......n thus u get 2 molecules of atp!
whereas as in aerobic resp. whole of the glucose molecul is oxidized n thus u get more atp,ie, 36(or38) atp molecule!!

Answer 8

Strictly speaking, the terms "aerobic" and "anaerobic" refer to the presence and absence of oxygen, respectively. Most cells of our body prefer to get the energy they need by using oxygen to fuel metabolism. During exercise with adequate fuel and oxygen (i.e., aerobic), muscle cells can contract repeatedly without fatigue. During anaerobic or non-oxygen conditions (higher intensity exercise), muscle cells must rely on other reactions that do not require oxygen to fuel muscle contraction. This anaerobic cell metabolism produces waste molecules that can impair repeated muscle contractions. We call this deterioration in performance fatigue.

Fatigue causes you to experience added discomfort and weakening muscles. Eventually you will need to slow down and lower your exercise intensity. Slowing down allows the muscles to once again rely solely on aerobic metabolism and support the removal or chemical conversion of waste molecules.

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. In reality, the more intensely we exercise, the greater the need for anaerobic energy production to supplement aerobic energy production. 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.

For example, while at rest, we rely totally on aerobic metabolism to fuel almost all our body's needs for energy. As we start to exercise, such as progressing from sitting to a slow walk, the increased energy needs of muscle contraction require that we increase our breathing and oxygen intake. So long as we increase our exercise intensity slowly, we can maintain our muscles' dependence on aerobic metabolism, and we don't experience symptoms of fatigue.

However, as exercise intensity increases, the need for energy release eventually exceeds that which can be supplied by aerobic metabolism. Our muscles simply need more reactions to support the energy demand. Therefore, anaerobic contribution to metabolism increases. When this happens, we refer to this change in metabolism as a metabolic threshold. This metabolic threshold represents the exercise intensity where we start to produce those waste products of anaerobic metabolism that can eventually lead to fatigue. You see this all the time when watching endurance Olympic events, such as a long distance running race. The athletes run at a pace that hovers around their metabolic threshold, and they can only afford to run faster than this pace near the end of the race. If they increase their pace too early in the race, then they fatigue too early and need to slow down to below their metabolic threshold to recover from the fatigue inducing waste products. This would result in poor performance.

So how do these terms relate to you? Well, it depends on your circumstance and goals. Most of us are non-competitive or non-elite active individuals, who just want to exercise to gain health benefits, feel good and possibly lose weight. Aerobic exercise conditions enable you to exercise for long periods of time, potentially benefiting from the sustained energy expenditure (i.e., calories burned). 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. However, to more rapidly improve your exercise capacities, tolerance, and performance, some anaerobic exercise training is a necessity. Therefore, performing anaerobic exercise is typically more important for competitive athletes.

When starting a training program, most trainers like to have their clients/athletes start with lower intensity exercise (i.e., aerobic exercise). However, a high reliance on anaerobic metabolism is unavoidable for some types of exercise or activities. For instance, lifting weights is anaerobic. That is why muscles fatigue so rapidly with this type of training. Other types of activities, such as walking up stairs, can also be anaerobic - especially if you are unfit or climb too fast.

Fortunately, we do not need sophisticated equipment to detect when we transition from aerobic to anaerobic exercise. As we approach and pass our metabolic threshold intensity, we start to breath harder, we are forced to really concentration on the exercise/activity, and exercise simply becomes uncomfortable. However, if you simply love gadgets, you can use a heart rate monitor to record the heart rate at which you sense these symptoms of developing over-exertion. You then know that heart rates below this value occur when you're in your aerobic zone, and heart rates above this value reflect an increasing anaerobic contribution to your exercise bout.

Answer 9

use of oxygen in A.M produces more energy.