Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an arsenic stimulus from compounds containing arsenic, including arsenates, arsenites, and arsenides. (Gene Ontology, GO_0046685)
21 genes participating in the response to arsenic-containing substance biological process from the curated GO Biological Process Annotations 2015 dataset.