Which one of the following statements regarding drug action in the central nervous system (CNS) is INCORRECT?Group of answer choicesG protein-coupled receptors can modulate ion-channel activity in the CNS.Glycine acts as an excitatory neurotransmitter in the CNS.Drugs can modulate the actions of both pre- and post-junctional receptors in the CNS.GABA acts as an inhibitory neurotransmitter in the CNS.
Question
Which one of the following statements regarding drug action in the central nervous system (CNS) is INCORRECT?Group of answer choicesG protein-coupled receptors can modulate ion-channel activity in the CNS.Glycine acts as an excitatory neurotransmitter in the CNS.Drugs can modulate the actions of both pre- and post-junctional receptors in the CNS.GABA acts as an inhibitory neurotransmitter in the CNS.
Solution
The incorrect statement is: "Glycine acts as an excitatory neurotransmitter in the CNS."
This is incorrect because glycine is actually an inhibitory neurotransmitter in the central nervous system, not an excitatory one. It works to slow down the activity of neurons in the CNS, which can help to reduce anxiety and promote sleep.
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