The Physiologic Effects Resulting from the Inhalation of Gaseous Anesthetic

The physiologic effects resulting from the inhalation of gaseous anesthetic agents and intravenous infusion of anesthetic drugs inhibit several areas of the central nervous system (CNS) .The processes by which they occur are explained by several proposed theories.Which of the options describes a plausible anesthetic mechanism of action?

A) Inhaled opiates are absorbed by dopamine antagonist receptors in the CNS.
B) Sodium channels trade places with potassium ions in the cerebral cellular cytoplasm.
C) Endorphins undergo biotransformation into protein-soluble compounds.
D) Synaptic transmission of nerve impulses in the CNS is inhibited.

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