Based on the Biosynthetic Pathway of Catecholamines Presented in Figure

Multiple Choice

Based on the biosynthetic pathway of catecholamines presented in figure 13.12, In the text which of the following would result in an increase in norepineprine?

A) inhibition of tyrosine hydroxylase
B) increase in available dopamine
C) a genetic mutation in the gene for dopamine beta-hydroxylase
D) depletion of the amino acid L-tyrosine
E) all of the above