Question 1

Which brain structure is primarily responsible for regulating circadian rhythms such as sleep and wakefulness?

Accepted Answer

Suprachiasmatic nucleus (SCN)

Question 2

A college student experiences difficulty concentrating and increased risk-taking after several nights of sleep deprivation. Which psychological function is most likely impaired?

Accepted Answer

Sustained attention and inhibition of impulses

Question 3

Which sleep stage is characterized by rapid eye movements and brain activity similar to wakefulness?

Accepted Answer

REM sleep

Question 4

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

Accepted Answer

Manifest content is the actual storyline; latent content is the hidden psychological meaning.

Question 5

Which hypothesis suggests that dreams help the brain remove unnecessary information, acting as a 'brainwashing' process?

Accepted Answer

Synaptic homeostasis hypothesis

Question 6

A person is in a vegetative state. According to the consciousness diagram, how does this state compare to REM sleep in terms of wakefulness and awareness?

Accepted Answer

Vegetative state has lower wakefulness and awareness than REM sleep.

Question 7

Which neurotransmitter system is most directly affected by stimulant drugs such as amphetamines and cocaine?

Accepted Answer

Dopaminergic system

Question 8

What is the primary effect of GABAergic drugs such as benzodiazepines and alcohol on the nervous system?

Accepted Answer

They increase inhibitory neurotransmission.

Question 9

Which of the following best describes the activation-synthesis hypothesis of dreaming?

Accepted Answer

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

Question 10

A patient is prescribed Ritalin for ADHD. Which neurotransmitter is most likely to be increased by this medication?

Accepted Answer

Dopamine

Question 11

Which sleep stage is associated with delta waves according to EEG recordings?

Accepted Answer

Stages 3 and 4 sleep

Question 12

If a person experiences jet lag after traveling across time zones, which biological rhythm is most disrupted?

Accepted Answer

Circadian rhythm

Question 13

Which of the following is a common consequence of chronic sleep deprivation in college students?

Accepted Answer

Decreased academic performance

Question 14

Which of the following best describes the role of the pineal gland in sleep regulation?

Accepted Answer

It produces melatonin in response to darkness.

Question 15

A person is given a hallucinogenic drug that acts on the serotonergic system. Which of the following drugs is most likely?

Accepted Answer

Psilocybin

Question 16

Which of the following is an example of an ultradian rhythm?

Accepted Answer

Heart rate

Question 17

Which sleep phenomenon is characterized by sudden, high-amplitude EEG spikes and is thought to protect sleep?

Accepted Answer

K-complex

Question 18

A person is experiencing vivid dreams and muscle atonia. Which sleep stage are they most likely in?

Accepted Answer

REM sleep

Question 19

Which of the following drugs is a sedative that acts primarily on the GABAergic system?

Accepted Answer

Alcohol

Question 20

Which formula best represents the relationship between sleep deprivation and cognitive performance, assuming a linear decline?

Accepted Answer

$$C = C_0$ - kD$$

Lecture 7: Consciousness – Wakefulness, Sleep, and Drugs

Study Guide - Practice Questions

Study Guide - Flashcards