Separation of (biochemical)processes and PBK model parameters

[jwkruisselbrink]

There are a number of terms that relate to related to (biochemical)processes and PBK model parameters in which it is not clear whether the definition relates to the process itself, or a parameter for modelling this process. For example, "renal excretion (PBPKO_00223)" seems to define the process. In this case, it seems that a definition for the parameter "renal excretion rate" is missing. This is also the case for many other terms related to clearance and excretion.