1. What is the primary neurochemical abnormality observed in individuals with Narcolepsy Type 1? A. Decreased serotonin levels B. Decreased dopamine levels C. Decreased orexin levels D. Increased GABA levels Answer: C. Decreased orexin levels Rationale: Narcolepsy Type 1 is characterized by a deficiency of orexin (hypocretin), which is crucial for regulating wakefulness and REM sleep. 2. Which of the following substances is most likely to induce a state of delirium? A. Cannabis B. Alcohol C. Cocaine D. Nicotine Answer: B. Alcohol Rationale: High levels of alcohol consumption can lead to alcohol-induced delirium, also known as delirium tremens, especially during withdrawal. 3. In the context of sleep-wake disorders, what does the term 'sleep hygiene' refer to? A. The cleanliness of the sleep environment B. The practices that promote regular, restful sleep C. The medical treatment for sleep disorders D. The genetic predisposition to sleep disorders Answer: B. The practices that promote regular, restful sleep Rationale: Sleep hygiene encompasses a variety of practices and habits that are necessary to have good nighttime sleep quality and full daytime alertness.