Question 1

Which brain structure is primarily responsible for regulating circadian rhythms by synchronizing with light information from the retina?

Accepted Answer

Suprachiasmatic nucleus (SCN)

Question 2

During which stage of sleep are vivid dreams and rapid eye movements most likely to occur?

Accepted Answer

REM sleep

Question 3

A person reports feeling conscious but unable to move upon waking, accompanied by a sense of terror and chest pressure. What is the most likely explanation for these symptoms?

Accepted Answer

Sleep paralysis

Question 4

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

Accepted Answer

Melatonin

Question 5

Which of the following best describes the function of sleep spindles and K-complexes during Stage 2 sleep?

Accepted Answer

They help maintain a state of sleep and may play a role in memory storage.

Question 6

A student who regularly consumes caffeine late in the evening is most likely to experience which of the following sleep issues?

Accepted Answer

Sleep displacement

Question 7

Which of the following is a plausible consequence of chronic shift work on cognitive function?

Accepted Answer

Substantial decline in memory, speed of processing, and overall brain power

Question 8

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

Accepted Answer

The brain's attempt to make sense of random neural activity during sleep

Question 9

Which of the following drugs is classified as a depressant and is known to lower inhibition and impair judgment at higher doses?

Accepted Answer

Alcohol

Question 10

A person with narcolepsy is most likely to experience which of the following symptoms?

Accepted Answer

Sudden onset of sleep directly into REM sleep

Question 11

Which neurotransmitter is most directly affected by stimulant drugs such as amphetamines and cocaine, leading to increased wakefulness and euphoria?

Accepted Answer

Dopamine

Question 12

Which of the following best explains why children spend more time in deep sleep (NREM 3/4) compared to the elderly?

Accepted Answer

Deep sleep is crucial for growth hormone production, which is more active in children.

Question 13

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

Accepted Answer

The body is paralyzed while the brain is highly active.

Question 14

A person who believes they are sleep deprived despite having a normal sleep pattern may be experiencing which sleep disorder?

Accepted Answer

Paradoxical insomnia (sleep-state misperception)

Question 15

Which of the following is a potential risk factor for developing cannabis-induced psychosis?

Accepted Answer

Frequent use and high THC content

Question 16

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

Accepted Answer

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

Question 17

Which of the following is a common effect of benzodiazepines when combined with alcohol?

Accepted Answer

Deadly suppression of breathing

Question 18

Which of the following best explains the restorative hypothesis of sleep?

Accepted Answer

Sleep restores and replenishes our bodies and brains, supporting memory consolidation and cognitive function.

Question 19

Which of the following is a likely consequence of sleep deprivation, according to research?

Accepted Answer

Increased stress and tendency to overreact emotionally

Question 20

Which of the following best describes the effect of MDMA (ecstasy) on the brain?

Accepted Answer

It stimulates massive serotonin release, heightening physical sensations and social bonding.

Consciousness: Sleep, Dreams, and Drugs – Psychology Study Notes

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