Serotonin
A)Is a neuromodulator
B)Facilitates incoming sensory stimuli in the CNS
C)Activity in the brain is highest during sleep
D)Both is a neuromodulator and facilitates incoming sensory stimuli in the CNS are correct
E)Both is a neuromodulator and activity in the brain is highest during sleep are correct

Question

Quizplus · Accepted Answer

Serotonin is a neuromodulator, which means it modulates or regulates the activity of other neurotransmitters in the brain.

Answer: E
 Serotonin is both a neuromodulator and its activity in the brain is highest during sleep. However, the statement "facilitates incoming sensory stimuli in the CNS" is incorrect as serotonin is involved in mood regulation, appetite, and sleep, but not directly in processing sensory information.