1. c They depress the reticular activating system (RAS).
3. a Patients who have been given extremely large doses of barbiturates are unresponsive to pain. (para 7-4b(6))
6. a Caution should be observed when prescribing these drugs to patients who have impaired liver function. (para 7-7c)
11. c A preanesthetic medication used to calm the patient.
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