Why Are Amino Acid Neurotransmitters NOT Considered Biogenic Amines

Multiple Choice

Why are amino acid neurotransmitters NOT considered biogenic amines?

A) Amino acids lose their activity when stored, while biogenic amines do not.
B) Biogenic amines may be taken up by non- conducting cells, while amino acids are not.
C) Amino acids used to make biogenic amines are not used for anything else.
D) Amino acids are excitatory only, while biogenic amines are not.
E) Biogenic amines still contain an amine group, but are no longer amino acids.