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Across
  1. 2. reduced responsiveness to a drug or substance after repeated use.
  2. 7. chronic neurological sleep disorder characterized by uncontrollable, sudden "sleep attacks" during the day, often involving a direct, involuntary lapse into REM sleep at inappropriate times.
  3. 9. a sleep disorder characterized by the, often exclusive, occurrence of breathing pauses during rapid eye movement sleep.
  4. 10. illegal and addictive drug derived from the morphine found in the seedpod of the opium poppy plant.
  5. 11. psychoactive drug derived from the Cannabis plant that contains the active ingredient THC.
  6. 14. the internal, biological "clock" that regulates bodily functions on a roughly 24-hour cycle.
  7. 17. chemical substances that alter perceptions, mood, and consciousness.
  8. 18. states that dreams result from the brain’s attempt to make sense of random neural activity.
  9. 19. persistent, recurring sleep disorder characterized by difficulty initiating or maintaining sleep.
  10. 20. drug obtained from leaves of the coca shrub and stimulate the nervous system.
  11. 23. the concept that sleep is essential for the body and mind to repair, recover, and replenish resources that are depleted during daily, wakeful activities.
  12. 26. any work schedule that falls outside the traditional 9-to-5, Monday-through-Friday daylight hours.
  13. 28. light-to-medium depth sleep stage lasting roughly 10–20 minutes, characterized by theta waves, further reductions in heart rate/temperature, and, most notably, sleep spindles and K-complexes
  14. 30. class of psychoactive drugs that reduce neural activity and slow down body functions.
  15. 32. the process by which newly acquired, unstable information is strengthened and stabilized in the brain, transforming it from short-term memory into long-lasting, stable long-term memory.
  16. 33. vivid, dreamlike sensory experiences—such as sensations of falling or floating.
  17. 34. stimulant drug that acts as a central nervous system stimulant and an antagonist of adenosine, a neurotransmitter that promotes sleep and relaxation.
Down
  1. 1. depressant drug that reduces neural activity and slows down the CNS.
  2. 3. drugs or substances that interfere with the process of neurotransmitter reabsorption by the presynaptic neuron.
  3. 4. the process by which unstable, newly acquired information in short-term memory is strengthened and transformed into stable, long-term memories over time.
  4. 5. awareness of ourselves and our environment.
  5. 6. a parasomnia characterized by the failure of normal muscle atonia during REM sleep, allowing the sleeper to physically act out vivid, often vivid, or violent dreams.
  6. 8. drug or chemical substance that binds to receptor sites and inhibits or blocks the action of a neurotransmitter
  7. 12. the deepest stage of non-REM sleep, often called slow-wave sleep (SWS), characterized by high-amplitude, low-frequency delta waves.
  8. 13. chronic, relapsing disorder characterized by compulsive drug seeking and use despite adverse, harmful consequences.
  9. 15. the initial, lightest, and shortest stage of sleep (about 5–10 minutes) acting as a transition from wakefulness to deeper sleep.
  10. 16. class of psychoactive drugs that distort perceptions and evoke sensory images in the absence of sensory input.
  11. 21. class of drugs that act on the body's opioid receptors, reducing pain and producing feelings of euphoria.
  12. 22. parasomnia sleep disorder characterized by complex behaviors performed during partial arousal from deep, slow-wave sleep; also known as sleepwalking.
  13. 24. the increased frequency, intensity, and duration of rapid eye movement sleep that occurs following a period of REM sleep deprivation.
  14. 25. recurring sleep stage during which vivid dreams commonly occur.
  15. 26. class of psychoactive drugs that excite neural activity and speed up body functions.
  16. 27. chemical or drug that binds to a receptor site and triggers a response, mimicking or enhancing the effect of a natural neurotransmitter.
  17. 29. temporary circadian rhythm sleep disorder caused by rapid travel across multiple time zones.
  18. 31. physical and psychological symptoms of discomfort, distress, and cravings that occur when a person discontinues or significantly reduces the use of an addictive substance.