David ingests a substance that is not typically found in the brain, although in this instance it did enter the brain. This substance would be labeled __________.
A) exogenous
B) endogenous
C) Homogenous
D) Heterogeneous

Question

Quizplus · Accepted Answer

Exogenous refers to a substance that originates from outside the body, in this case, a substance that entered the brain from an external source. Endogenous refers to a substance that is naturally produced within the body. Homogeneous and heterogeneous refer to the uniformity or diversity of a substance and are not relevant to the situation described in the question.

David Ingests a Substance That Is Not Typically Found in the Brain