Why might the cells of two different organs respond differently tp cyclic amp activation?

Cells have different receptors on the surfaces that respond to different molecules that bind to respective receptors.  Additionally, two cells types with the same receptor for the same molecule can respond differently due to differences in the activation of secondary messenger chains. Most of the downstream signals of cAMP are propagated by cAMP-dependent protein kinase A (PKA) which also varies in different cell types of different tissues.

emerging idea only occurs as a raw idea that could appear out of nowhere. meanwhile, to reach scientific consensus , that idea must be structured and tested over and over again through various experiments. the scientific consensus transforms the raw idea into idea that is more reliable through the process of scientific elimination.

bal is blood alcohol level. bac will normally be higher in a person with more body fat. so the answer to your question would be, as body fat decreases, the increasing rate of bal decreases.