Question 1

Which of the following best describes the role of the suprachiasmatic nucleus (SCN) in regulating sleep?

Accepted Answer

It synchronizes the body's circadian rhythm with external light cues by receiving information from the retina.

Question 2

A person reports waking up unable to move, feeling a menacing presence, and experiencing chest pressure. Which sleep phenomenon are they most likely experiencing?

Accepted Answer

Sleep paralysis

Question 3

Which hormone is most closely associated with the onset of sleep and is secreted in response to darkness?

Accepted Answer

Melatonin

Question 4

During which stage of sleep are delta waves most prominent and growth hormone production is at its peak?

Accepted Answer

Stage 3 and 4 (Deep sleep)

Question 5

Which of the following is a key difference between REM sleep and NREM sleep?

Accepted Answer

REM sleep features vivid dreams and rapid eye movements, while NREM sleep has fewer dreams and no eye movements.

Question 6

According to the activation-synthesis theory, what is the primary cause of dreams?

Accepted Answer

Dreams are the brain's attempt to make sense of random neural activity during sleep.

Question 7

A college student who regularly works night shifts reports difficulty concentrating, increased irritability, and poor memory. Which of the following best explains these symptoms?

Accepted Answer

They are suffering from the effects of rotating shift work disrupting their circadian rhythm.

Question 8

Which of the following best describes paradoxical insomnia?

Accepted Answer

A sleep disorder where people believe they are sleep deprived despite normal sleep cycles.

Question 9

Which of the following is a common effect of chronic sleep deprivation?

Accepted Answer

Degeneration of neurons in the brainstem and increased risk of physical and mental health problems

Question 10

Which of the following drugs is classified as a depressant and is known for its risk of fatal respiratory depression when combined with alcohol?

Accepted Answer

Barbiturates

Question 11

A person who walks around while fully asleep but has vague awareness of their surroundings is most likely experiencing which sleep disorder?

Accepted Answer

Somnambulism (sleepwalking)

Question 12

Which of the following statements about marijuana (THC) is TRUE?

Accepted Answer

It can impair memory consolidation due to its action on cannabinoid receptors in the hippocampus.

Question 13

Which of the following best explains the balanced-placebo design in alcohol research?

Accepted Answer

It separates the effects of expectation from the physiological effects of alcohol.

Question 14

Which of the following is a characteristic effect of amphetamines?

Accepted Answer

They increase the release of dopamine, which can lead to neurological and physical problems with chronic use.

Question 15

Which of the following is a key feature of REM sleep?

Accepted Answer

Brain waves are similar to wakefulness, but the body is paralyzed.

Question 16

According to Freud, what is the difference between latent and manifest content in dreams?

Accepted Answer

Manifest content is the storyline of the dream, while latent content is the hidden, unconscious meaning.

Question 17

Which of the following best describes the effect of caffeine on the brain?

Accepted Answer

It blocks the activity of adenosine, promoting wakefulness.

Question 18

A person experiences sudden, unexpected episodes of sleep during the day, sometimes accompanied by loss of muscle tone (cataplexy). Which disorder is most likely?

Accepted Answer

Narcolepsy

Question 19

Which of the following is a potential consequence of chronic shift work, according to research?

Accepted Answer

Substantial decline in memory, processing speed, and overall brain power, which can be reversible after several years

Question 20

Which of the following best explains the evolutionary (problem-solving) theory of dreaming?

Accepted Answer

Dreams help us process and reconsider information critical for survival, often reflecting daily concerns and threats.

Consciousness: Sleep, Dreams, and Psychoactive Drugs

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