Adenosine is a _____ the discharge rate of many central neurons.
A)depressant that increases
B)depressant that decreases
C)stimulant that increases
D)stimulant that decreases

Question

Quizplus · Accepted Answer

Adenosine is a natural neuromodulator that acts to decrease neural activity by inhibiting the release of neurotransmitters. It binds to adenosine receptors, which are G-protein coupled receptors, and reduces the activity of adenylate cyclase, leading to decreased levels of cyclic AMP (cAMP) and decreased intracellular calcium levels. This decrease in intracellular calcium leads to decreased neurotransmitter release and a decrease in the discharge rate of many central neurons. Therefore, adenosine is a depressant that decreases the discharge rate of many central neurons.

Adenosine Is a _____ the Discharge Rate of Many Central