Question

Is there any catalyst required to perform anaerobic respiration in human being?
Does the anaerobic respiration activates automatically during the stortage of oxyzen?

Answer 1

No there is no need of any catalyst to perform anaerobic respiration in human beings .
It occurs automatically when there is shortage of oxygen in the cells.It occurs mainly in the muscle cells.
If there is too little Oxygen present, anaerobic respiration might occur. This is a less efficient method of energy release than aerobic respiration because oxygen is involved in a key, energy releasing step in the process of respiration. When this step cannot occur (such as when there is limited oxygen) an alternate pathway is taken which leads to a small amount of energy being released along with (in the case of humans and non-human animals) lactic acid.