High levels of MHPG, HVA, and VMA in the blood and urine can indicate
A) increased transporter activation.
B) hypertension.
C) dysfunctional receptors.
D) level of catecholaminergic activity in the nervous system.

Question

Quizplus · Accepted Answer

High levels of MHPG (3-methoxy-4-hydroxyphenylethylene glycol), HVA (homovanillic acid), and VMA (vanillylmandelic acid) in the blood and urine indicate the level of catecholaminergic activity in the nervous system. These are metabolites of noradrenaline, dopamine, and adrenaline, respectively. Increased levels of these metabolites suggest increased release and turnover of these neurotransmitters in the nervous system.

High Levels of MHPG, HVA, and VMA in the Blood