The process by which radioactive materials that have been incorporated by biological functions into the body tissues and organs are eliminated from the body as are their non-radioactive counterparts is referred to as?

Decontamination

Explanation:

Decontamination is a process of exiting radioactive materials or chemicals from a targetted body. It could be from an individual, an object, a place or a geographic location.

Depending on the degree, decontamination can be done using disinfection, antisepsis, sterilization, autoclaving etc.