試題詳解

54. Which of the following descriptions of catecholamines is NOT correct?
(A) Catecholamine neurotransmitters are derived from tyrosine.
(B) Epinephrine and dopamine are catecholamine neurotransmitters.
(C) Defects in catecholamine processing are responsible for several neurological disorders, such as parkinsonism.
(D) Catecholamine neurotransmitters are frequently found in sympathetic neurons and adrenal glands.
(E) Because of the presence of the blood-brain barrier, catecholamine neurotransmitters only function in the circulation system.