Regarding Its Role as a Neurotransmitter in the CNS,norepinephrine

Multiple Choice

Regarding its role as a neurotransmitter in the CNS,norepinephrine

A) Is secreted by brain stem neurons in response to sensory stimulation
B) Amplifies weak sensory signals and dampens strong ones so that more information can reach conscious levels
C) Is important for maintaining directed attention
D) Both is secreted by brain stem neurons in response to sensory stimulation and is important for maintaining directed attention are correct
E) All of the choices are correct