Caffeine produces alertness by
A)increasing the release of adenosine.
B)blocking receptors for adenosine.
C)stimulating nicotinic acetylcholine (ACh) receptors.
D)blocking receptors for serotonin.

Question

Caffeine produces alertness by​ 
A)increasing the release of adenosine. 
B)blocking receptors for adenosine. 
C)stimulating nicotinic acetylcholine (ACh) receptors. 
D)blocking receptors for serotonin.

Quizplus · Accepted Answer

Caffeine works by blocking the receptors for adenosine, a neurotransmitter that promotes relaxation and sleepiness. By blocking these receptors, caffeine prevents adenosine from signaling the brain to slow down and become less active, leading to increased alertness and wakefulness.

Caffeine Produces Alertness By​

Caffeine Produces Alertness By