Question

Which substance is associated with increased alertness and wakefulness due to its action on adenosine receptors?

a. Caffeine
b. Nicotine
c. Alcohol
d. Opiates

Answer 1

Caffeine is a substance associated with increased alertness and wakefulness due to its action on adenosine receptors.

Step-by-step explanation:

Caffeine is a substance associated with increased alertness and wakefulness due to its action on adenosine receptors. Caffeine is an adenosine antagonist, inhibiting the adenosine receptors and decreasing sleepiness, thus promoting wakefulness.