Which of the following best describes the circadian rhythm?

• the pattern of emotional ups and downs we routinely experience

• a pattern of biological functioning that occurs on a roughly 24-hour cycle

• the cycle of five distinct stages that we experience during a normal night's sleep

Which psychoactive drug category produces sensory stimuli in the absence of sensory input?

• Stimulant

• Hallucinogen

• Depressant

Why is REM sleep considered a paradox?

• our heart rate is slow and steady, while our breathing is highly irregular

• we are deeply asleep but can be awakened easily

• our nervous system is highly active, while our voluntary muscles hardly move

Which endocrine gland releases melatonin to help you wind down and fall asleep?

• Hypothalamus

• Pineal

• Adrenal

During which stage of the sleep cycle do humans dream?

• NREM-1

• NREM-2

• NREM-3

• REM

When would someone typically walk or talk in their sleep?

• NREM-1

• NREM-2

• NREM-3

• REM

How often does the human sleep cycle repeat itself?

• About every 90 minutes

• About every 4 hours

• Every 1.5 days

The superchiasmatic nucleus is located in which brain structure?

• Hippocampus

• Hypothalamus

• Hyperbellum

Which of the following describes the hidden underlying meaning of a dream, according to Freud?

• Manifest Content

• Latent Content

Which sleep disorder is characterized by temporary cessations of breathing during sleep and repeated momentary awakenings?

• Insomnia

• Sleep Apnea

• Narcolepsy

• Night Terrors