In computational complexity theory, a problem refers to the abstract question to be solved. In contrast, an instance of this problem is a rather concrete utterance, which can serve as the input for a decision problem. For example, consider the problem of primality testing.
Oxygen plays a vital role in both the aerobic and anaerobic metabolic systems. While oxygen is required as a direct energy source in the aerobic system, it is also essential in clearing the blood of excess lactic acid buildup in the anaerobic system.
Aerobic metabolism is a physiological process that requires oxygen to be available in order to use carbohydrate, fat, or protein for energy production. When oxygen is not available, only carbohydrate can be used for energy, this is anaerobic metabolism.You use primarily aerobic metabolism for energy when you are working at a low to moderate pace during exercise. Walking briskly, cycling at approximately 12 mph, or a light to moderate jog would be good examples.hen oxygen is not available, only carbohydrate can be used for energy, this is anaerobic metabolism. You use primarily aerobic metabolism for energy when you are working at a low to moderate pace during exercise.