Question

The neurotransmitter norepinephrine is terminated by the enzymes __________ and __________.

a. catechol O-methyltransferase (COMT) and monoamine oxidase (MAO)
b. catechol O-methyltransferase (COMT) and cholinesterase
c. cholinesterase and monoamine oxidase (MAO)
d. monoamine oxidase (MAO) and pseudocholinesterase

Answer 1

a) Catechol O-methyltransferase (COMT) and monoamine oxidase (MAO) are the enzymes responsible for terminating the neurotransmitter norepinephrine.

Step-by-step explanation:

The neurotransmitter norepinephrine is terminated by the enzymes catechol O-methyltransferase (COMT) and monoamine oxidase (MAO).

Catechol O-methyltransferase (COMT) is responsible for degrading norepinephrine in the extracellular space, while monoamine oxidase (MAO) breaks down norepinephrine within the presynaptic terminal.