User blog comment:Xaero Dumort/"Synthetics" as applied to the ending and the sentence that nullifies IT./@comment-4237253-20120624070354/@comment-1341687-20120624172956

It's an electrical signal. We would have to assume that (in the case of organics) as most hold all the necessary pieces to implement synthetic and create synthetic parts that the signal could not only be a carrier wave triggering some sort of DNA change through brain signals but also through insertion of nanomachines or the like, depending on how Reaper code works on the cellular level as I already assume it to be an biosynthetic thing through my geth reasoning above.

I think it also helps explain how Husks of any variety are so machine yet still organic as well.