Activation of pepsinogen starts when hydrocholoric acid (HCl), which is secreted by the parietal cells partially activates pepsinogen (pepsinogen* in figure). This partially active enzyme then cleaves the peptide from other pepsinogen molecules to form active pepsin.
The cloud that usually means good weather is Cu<span>mulus</span>
The ATP production would slow down due to the lack of resources the cells need in order to create the energy. The cells would become tired and weak the cells would then start to take energy from your muscles in order to continue to replicate.