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 or Anaerobic. Your cellular respiration or cellular metabolism can be aerobic or anaerobic. These are processes in which energy is converted from the food you eat into energy molecules that the cells of your body can use.Aerobic respiration occurs in the presence of oxygen, while anaerobic metabolism occurs in the absence of oxygen.The type of respiration you use depends on the intensity and duration of your exercise.erobic respiration occurs in the presence of oxygen, while anaerobic metabolism occurs in the absence of oxygen. The type of respiration you use depends on the intensity and duration of your exercise.