Study Notes: Caffeine, Biochemical Pathways

Well I started reading about the sympathetic nervous system and ended up here.

sympathetic nerves near pacemaker tissue -> noradrenaline -> (various) cell surfaces

adrenal glands -> adrenaline -> (various) cell surfaces

(various) cell surfaces ->  cyclic adenosine monophosphate (cAMP) -> (various) intra-cellular effects;

phosphodiesterase (PDE) metabolises cAMP to AMP; caffeine blocks the action of PDE -> causing amplification of cAMP effects