The brain releases neuropeptide s that modulates stress by sleep and alertness/anxiety. a. stabilizing; increasing b. decreasing; increasing c. increasing; decreasing d. increasing; stabilizing

Answer is b. Decreasing ; increasing

Neuropeptides are a class of messenger molecules present in central nervous system of many mammalian brain.  About 100 different neuropeptides made and release from the hypothalamus of mammalian brain.  A neuropeptide, after release may diffuse in the blood to exert its action on sleep, alertness, anxiety.  Thus, neuropeptides play key roles in modulating neuronal activity.

the denominator has a very specific role.