Two ways of defining death are Functional death and which other term?

• A. Brain death
• B. Functional age
• C. Crystallized intelligence
• D. Gerontology

Answer: (A)

Medical definitions of death include a functional view—where death means the irreversible loss of integrated bodily functions—and brain death, which is the irreversible cessation of all brain activity. Brain death is the term that pairs with functional death as a formal definition of death; even with life support maintaining circulation and respiration, the person is considered dead when the brain no longer functions irreversibly. The other options relate to aging or cognition (functional age, crystallized intelligence, gerontology) and do not define death.