Which of the Following Statements Regarding Neurotransmitters Is TRUE

question 20

Multiple Choice

Which of the following statements regarding neurotransmitters is TRUE?

• A)Acetylcholine is broken down by enzymes present on postsynaptic cell membranes.
• B)Acetylcholine that is released at synapses binds to adrenergic receptors in the postsynaptic cell membrane.
• C)Catecholamines are the most abundant neurotransmitters in the central nervous system.
• D)Opiate drugs,such as morphine,are antagonists of a class of neurotransmitters called endorphins.
• E)Gamma-aminobutyric acid (GABA)is a major excitatory transmitter in the central nervous system.

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