The Majority of the Neurotransmitter Norepinephrine (NE)is ____________; Its Precursor

Multiple Choice

The majority of the neurotransmitter norepinephrine (NE) is ____________; its precursor (that is,the chemical from which it is directly converted) is ____________.

A) metabolized in the synaptic cleft; l-dopa
B) metabolized in the synaptic cleft; dopamine
C) taken back up into the presynaptic terminal; l-dopa
D) taken back up into the presynaptic terminal; dopamine