Many anesthetic drugs exert their clinical effects via an interaction with the GABA receptor complex. The influx of chloride caused by the interaction results in inhibition of neuronal electrical activity. Propofol, for example, directly stimulates the GABA receptor to allow the shift of chloride into the cell. Which of the following is the mechanism of action for propofol?
1) Indirect inhibition of GABA receptors
2) Blockade of GABA receptors
3) Direct stimulation of GABA receptors
4) Enhancement of GABA release