Nitric oxide is unique among neurotransmitters because it
A)blocks the reuptake of dopamine.
B)is not stored in synaptic vesicles but is made on demand.
C)dilates airways during an asthma attack.
D)is both inhibitory and excitatory.
E)is only found in the PNS.

Question

Quizplus · Accepted Answer

Nitric oxide is not stored in synaptic vesicles like other neurotransmitters but is synthesized on demand by the enzyme nitric oxide synthase (NOS). This makes it unique among neurotransmitters.

Nitric Oxide Is Unique Among Neurotransmitters Because It