Question 1

Which structure in the brain is primarily responsible for regulating circadian rhythms by responding to light signals from the retina?

Accepted Answer

Suprachiasmatic nucleus (SCN)

Question 2

What is the main function of melatonin in the sleep-wake cycle?

Accepted Answer

Promotes sleep by peaking at night

Question 3

Which sleep stage is most closely associated with vivid dreaming and memory consolidation?

Accepted Answer

REM sleep

Question 4

As people age, which type of sleep decreases the most?

Accepted Answer

REM sleep

Question 5

Which theory of sleep suggests that sleep helps restore energy and repair the body?

Accepted Answer

Restore and repair hypothesis

Question 6

A person who prefers to go to bed late and wake up late is demonstrating which concept?

Accepted Answer

Chronotype

Question 7

Which of the following is a recommended nonpharmacological technique for improving sleep hygiene?

Accepted Answer

Get out of bed if unable to sleep after 30 minutes

Question 8

Which sleep disorder is characterized by temporary pauses in breathing during sleep and is more common in overweight individuals?

Accepted Answer

Sleep apnea

Question 9

According to the activation-synthesis hypothesis, what is the origin of dreams?

Accepted Answer

Random brain activity from the pons

Question 10

Which drug category increases nervous system activity and can lead to increased alertness and energy?

Accepted Answer

Stimulants

Question 11

What is the main neurotransmitter affected by cocaine, leading to its addictive properties?

Accepted Answer

Dopamine

Question 12

Which of the following best describes psychological dependence?

Accepted Answer

Emotional craving for a drug

Question 13

Which sleep disorder involves acting out dreams due to failure to block movement during REM sleep?

Accepted Answer

REM sleep behavior disorder

Question 14

Which theory of hypnosis suggests that consciousness is divided into two parts: one responding to suggestions and another monitoring behavior?

Accepted Answer

Dissociation theory

Question 15

Which of the following is NOT a recommended strategy for overcoming insomnia?

Accepted Answer

Drink alcohol to help you fall asleep

Question 16

Which drug category is most likely to cause perceptual distortions and hallucinations?

Accepted Answer

Hallucinogens

Question 17

A person who enters REM sleep almost instantly and experiences sudden sleep attacks during the day is most likely suffering from:

Accepted Answer

Narcolepsy

Question 18

Which of the following equations best represents the relationship between frequency ($$f$$), wavelength ($$\lambda$$), and the speed of a brain wave ($$v$$)?

Accepted Answer

$$v = f 	imes \lambda$$

Question 19

Which network in the brain is most active during mind-wandering and self-related thinking?

Accepted Answer

Default mode network

Question 20

Which of the following is a short-term effect of stimulant use?

Accepted Answer

Increased alertness and energy

Consciousness, Sleep, and Biological Rhythms

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