Different body cells can respond differently to the same peptide hormones because
A) each cell converts that hormone to a different metabolite.
B) a target cell's response is determined by the components of its signal transduction pathways.
C) the circulatory system regulates responses to hormones by routing the hormones to specific targets.
D) different target cells have different sets of genes.
E) the hormone is chemically altered in different ways as it travels through the circulatory system.
Answer: B