Nitric oxide is unique because it:
a. dialates airways during an asthma attack
b. is not stored in vesicles but is made on demand
c. blocks the reuptake of dopamine
d. is only found in the pns
e. is both inhibitory and excitatory

I believe ur answer is b. Is not stored in vesicles but is made on demand.
 hope this helps.

Read the sentences below in 1962, i tried to enroll as the first black student at the university of mississippi. the governor of mississippi blocked my entrance which best describes the verbs used in the sentences? o they are past tense verbs, which are often used in narrative essays o they are past tense verbs, which are not often used in narrative essays. o they are future tense verbs, which are often used in narrative essays o they are future tense verbs, which are not often used in narrative essays.