Caffeine promotes wakefulness by:
A)activating adenosine receptors.
B)agonistic activity at adenosine receptors.
C)antagonistic activity at adenosine receptors.
D)inhibiting calcium release from intracellular stores.

Question

Quizplus · Accepted Answer

Caffeine has an antagonistic activity at adenosine receptors. Adenosine promotes sleep and it's levels build up throughout the day, making us feel more tired as the day goes on. Caffeine blocks the adenosine receptors, which reduces the feeling of tiredness and promotes wakefulness.

Caffeine Promotes Wakefulness By