What is the function of caffeine?

What is the function of caffeine?
caffeine has effect to put on a pedestal the blood pressure and stimulate our body. it can be contained in coffee, tea and chocolate. Hence after consuming them, usually we touch stimulated and strong, we don't feel sleepy for some times.
It's used as a stimulant for rabbits that are one tested for makeup companies,much the same style as it's used to make paris hilton look smaller number of a "skank"
Caffiene is a natural psychoactive drug which you can find surrounded by in the leaves and beans of the coffee plant, surrounded by tea, yerba mate, and guarana berries, the kola nut, the Yaupon Holly, and in small quantity in cocoa. This is a Xanthine derivative alkaloid ( (3,7-dihydro-purine-2,6-dione, which is a purine foundation found in most body tissues and fluids and within other organisms). Caffeine is a central like a cat on hot bricks system (CNS) stimulant, having the effect of temporarily warding stale drowsiness and restoring alertness.
Caffeine acts through multiple mechanism involving both action on receptors and channel on the cell membrane, as well as intracellular management on calcium and cAMP pathways. By honesty of its purine structure it can act on some of impossible to tell apart targets as adenosine related nucleosides and nucleotides, approaching the cell surface P1 GPCRs for adenosine, as well as the intracellular Ryanodine receptor which is the physiological target of cADPR (cyclic ADP ribose), and cAMP-phosphodiesterase (cAMP-PDE). Although the management is agonistic in some cases, it is antagonistic within others. Physiologically, however, caffeine action is unlikely due to increased RyR gap, as it requires plasma concentration above lethal dosage. The performance is most likely through adenosine receptors.