Specificity of cellular communication, from signal to functional response

The specificity and complexity of molecular interaction is undoubtedly the characteristic trait shared by all universal matter. Quantum physics describes the nanometric particles that constitute it and the physically relevant properties that they express, by complex mathematical formulas, but it fails to identify the essence of the interactions that act within it.
He also adopted a dedicated nomenclature for their description, but in no way manages to materialize them in an easily intelligible form.
Even more difficult is trying to understand how communication between cells and living beings happens and how they can transfer a large variety of languages effectively. These communications use different identifiable codes within the same community even when issued simultaneously.
The solution adopted to make such a complex system of interactions effective is the result of the millennial evolution and selection of an infinite number of molecules, each able to transmit with its characteristic steric imprint, a unique and unmistakable message.
In this article we are going to describe how this mysterious communicative phenomenon takes place, even if we cannot grasp its intimate nature, which leaves us overwhelmed by so much complexity.