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The correct answer is option (B) the cells of a person who has recently consumed coffee would have increased levels of cAMP.
The most popular central nervous system (CNS) stimulant in the world is caffeine. It has a wide range of pharmacological and physiological effects, including effects on the heart, lungs, kidneys, smooth muscles, mood, memory, alertness, as well as physical and mental performance.
With a molecular weight of 194.19 and a chemical structure of C8H10N4O2, caffeine (1,3,7-trimethylxanthine) is an alkaloid found in plants. It is a bitter, white powder in its purest form. Caffeine and the other methylxanthines are structurally similar to purines. Caffeine has a mean plasma half-life of roughly 5 hours in healthy people. Although caffeine's total plasma clearance rate is thought to be 0.078 L/h/kg, its elimination half-life may range from 1.5 to 9.5 hours (Brechtel and Richter, 1992; Busto et al., 1989). The large variability in the plasma mean half-life of caffeine is caused by a combination of physiological and environmental factors that affect caffeine metabolism as well as inherent individual variation (e.g., pregnancy, obesity, use of oral contraceptives, smoking, altitude). Similar to other methylxanthines, caffeine has similar pharmacological effects (including those found in various teas and chocolates). The ability to maintain intellectual engagement, modest CNS stimulation, alertness, and slowed reaction times are among these consequences.
The complete question is:
Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently consumed coffee would have increased levels of _____.
A) phosphorylated proteins
B) cAMP
C) adenylyl cyclase
D) activated G proteins
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