Answer:
C. cAMP receives a message from a nonsteroid hormone and carries the message into the cell.
Explanation:
Water soluble hormones, the non-steroid hormones bind to their cell surface receptors to activate the G protein. The activated G protein activates adenylyl cyclase which in turn leads to the formation of cAMP from ATP. The cAMP activates protein kinases which in turn phosphorylates the cytoplasmic proteins. The activates cytoplasmic proteins bring about the desired response.
In this way, the cAMP second messenger system delivers the information from hormones to the cell via cAMP.
