Caffeine and related stimulants exert their effects by
A) mimicking a specific neurotransmitter.
B) inhibiting a specific neurotransmitter.
C) mimicking a specific neuromodulator.
D) inhibiting a specific neuromodulator.

Question

Quizplus · Accepted Answer

Caffeine and related stimulants exert their effects primarily by inhibiting a specific neuromodulator, adenosine, which promotes sleep and relaxation. By blocking adenosine receptors, caffeine increases alertness and reduces the feeling of being tired.

Caffeine and Related Stimulants Exert Their Effects by