Question 1

Which of the following best describes consciousness as presented in the study materials?

Accepted Answer

A continuum that ranges from full awareness to deep sleep.

Question 2

Which brain structure acts as the body's internal clock, regulating circadian rhythms?

Accepted Answer

Suprachiasmatic nucleus (SCN)

Question 3

A student is able to focus on a single conversation in a noisy room, ignoring other voices. This is an example of:

Accepted Answer

Selective attention

Question 4

Which hormone is primarily responsible for making us feel sleepy and is regulated by the circadian rhythm?

Accepted Answer

Melatonin

Question 5

What is the main function of sleep according to the study materials?

Accepted Answer

To support cognitive function and memory formation.

Question 6

Which type of brain wave is most characteristic of deep, restorative sleep?

Accepted Answer

Delta waves ($$\u003e3\ \mathrm{Hz})$$

Question 7

A person who is able to stay focused on a single task for a long period is demonstrating:

Accepted Answer

Sustained attention (vigilance)

Question 8

Which of the following is NOT a factor that impacts vigilance?

Accepted Answer

Increased melatonin production

Question 9

Which sleep stage is most associated with vivid dreaming and rapid eye movements?

Accepted Answer

REM sleep

Question 10

What is the effect of sleep deprivation on cognitive function?

Accepted Answer

It impairs attention, memory, and judgement.

Question 11

Which of the following best describes the role of K-complexes in sleep?

Accepted Answer

They are singular, high amplitude waves that help maintain sleep and aid in memory consolidation.

Question 12

A person who can focus on multiple tasks at once is demonstrating:

Accepted Answer

Divided attention

Question 13

Which of the following is a real-world consequence of circadian rhythm disruption?

Accepted Answer

Jet lag and shift work fatigue

Question 14

Which phase of sleep is characterized by bursts of rapid, rhythmic brain activity known as sleep spindles?

Accepted Answer

Stage 2 NREM

Question 15

If a person’s body temperature fluctuates cyclically over a 24-hour period, this is an example of:

Accepted Answer

A circadian rhythm

Question 16

Which of the following is most likely to occur as sleep deprivation increases?

Accepted Answer

Impaired attention and increased risk of heart disease

Question 17

Which brain area is NOT directly involved in the sleep-wake cycle?

Accepted Answer

Cerebellum

Question 18

A person is easily awakened from sleep and shows theta waves interrupted by sleep spindles and K-complexes. Which sleep stage are they most likely in?

Accepted Answer

Stage 2 NREM

Question 19

Which of the following best explains why optimal sleep is important for students?

Accepted Answer

It increases capacity for creative thinking, language learning, and inferential judgements.

Question 20

Which of the following is a plausible consequence of ignoring sleep deprivation over time?

Accepted Answer

Impaired immune system and increased risk of chronic diseases

Consciousness: Biological and Cognitive Perspectives – Study Notes

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