Question 1

The stage of sleep marked by the production of very slow delta waves is __________ sleep.

Accepted Answer

The answer of The stage of sleep marked by the...

Question 2

During which part of sleep are you most likely to dream?

Accepted Answer

REM (rapid eye movement) sleep is the stage of sleep where you are most likely to dream. During this stage, your brain activity increases and your body becomes temporarily paralyzed, except for your eye muscles which move rapidly, hence the name. This stage usually occurs about 90 minutes after falling asleep and reoccurs multiple times throughout the night, with longer and more vivid dreams occurring towards the end of the sleep cycle.

Question 3

James has been sleeping for about 90 minutes when his brain shows rapid,irregular waves.His blood pressure rises,his heart rate increases,and his skeletal muscles go limp.Which of the following is the most likely conclusion?

Accepted Answer

The described physiological changes, including rapid, irregular brain waves, increased heart rate, and limp skeletal muscles, are characteristic of REM (rapid eye movement) sleep.

Question 4

Emilio is currently in Stage 2 sleep.This means his EEG is showing __________ waves.

Accepted Answer

Stage 2 sleep is characterized by occasional bursts of rapid, high-peaking waves known as sleep spindles and occasional waves of higher amplitude called K-complexes. Therefore, option C "occasional bursts of rapid, high-peaking" is the best choice.

Question 5

Judith is startled when her 6-year-old daughter,Laura,sleepwalks into the family room and begins to talk.It is most likely that Laura is experiencing the _______________ stage of the sleep cycle.

Accepted Answer

The answer of Judith is startled when her 6-year-old daughter,Laura,sleepwalks...

Question 6

Which is the stage of sleep from which you would be most easily awakened?

Accepted Answer

Stage 1 is the lightest stage of sleep, and one can easily wake up from it. In this stage, a person falls asleep but is not fully asleep yet, and their brain waves are slower than when they are awake.

Question 7

REM sleep has been called "paradoxical sleep" because

Accepted Answer

During REM sleep, the brain is very active and resembles wakefulness, yet the body is entirely inactive and relaxed, almost paralyzed. This paradoxical combination of high brain activity and low muscle tone gives REM sleep its nickname of paradoxical sleep.

Question 8

On average,REM sleep periods last about

Accepted Answer

The answer of On average,REM sleep periods last about
...

Question 9

If Alice's strange adventures in Wonderland were actually the dreams of a young girl,they probably occurred when she was in __________ sleep.

Accepted Answer

Alice's dreams in Wonderland have many characteristics of REM (Rapid Eye Movement) sleep, such as vivid and bizarre imagery, illogical plotlines, and the feeling of being immersed in a different world. Therefore, it is most likely that Alice's adventures occurred during REM sleep.

Question 10

When researchers studied whether dreaming occurs in non-REM sleep they found that

Accepted Answer

Research has shown that dreaming does occur in non-REM sleep, but the dreams are shorter and less vivid than in REM sleep. This supports the idea that there are different types of dreaming depending on the stage of sleep.

Question 11

The sleep stage characterized by long bursts of rapid,irregular brain waves and relaxed skeletal muscles is also associated with

Accepted Answer

The sleep stage characterized by long bursts of rapid, irregular brain waves and relaxed skeletal muscles is known as REM (rapid eye movement) sleep. This stage is associated with the active dreaming phase of sleep, where brain activity is high and the eyes move rapidly. Therefore, the best choice is A, rapid eye movement.

Question 12

On a typical night,REM sleep occurs for the first time

Accepted Answer

REM sleep typically occurs about 70 to 90 minutes after sleep onset, following a period of non-REM sleep.

Question 13

During which sleep stage do sleep spindles first occur?

Accepted Answer

Sleep spindles first occur during Stage 2 sleep. This stage is characterized by a decrease in brain activity and relaxation of the body, as well as the appearance of sleep spindles which are brief bursts of rapid brain waves.

Question 14

Emily is currently in Stage 1 sleep.This means she is

Accepted Answer

Stage 1 sleep is characterized by irregular brain waves and a light sleep. It is also common to experience sudden muscle movements during this stage. Delta waves are not present in Stage 1 sleep, and being hard to rouse and having completely relaxed muscles are characteristics of deeper stages such as Stages 3 and 4. Being relaxed but awake is an indication of Stage W (Wakefulness).

Question 15

You wake up your friend Ernesto with a phone call late at night,and he describes the dream from which he awoke.He describes in great detail the colorful adventure he experienced.What stage of sleep was Ernesto most likely in when you woke him?

Accepted Answer

Ernesto most likely woke up during the REM (Rapid Eye Movement) stage of sleep as this is the stage where the brain is most active and vivid dreams occur.

Question 16

The reason that REM sleep occurs is

Accepted Answer

The exact reason why REM sleep occurs is still not fully understood, making "unknown" the most accurate answer. While there are theories suggesting REM sleep plays a role in memory consolidation, problem-solving, and tension release, the definitive purpose of REM sleep remains a subject of ongoing research.

Question 17

What brain waves are probably dominant in the brain of someone who is sleepwalking?

Accepted Answer

Delta waves are associated with deep sleep and slow wave sleep, which is when sleepwalking is most likely to occur. Alpha waves are predominantly produced during relaxation or meditation, beta waves are associated with alertness and concentration, and spindles are fast bursts of brain activity associated with the transition between lighter and deeper stages of sleep.

Question 18

The deepest stage of sleep is __________ sleep.

Accepted Answer

Stage 4, also known as delta or slow-wave sleep, is the deepest stage of sleep characterized by the slowest brain waves and the greatest relaxation of the body. It is the stage where the body repairs and regenerates tissues, strengthens the immune system, and consolidates memories.

Question 19

During the night

Accepted Answer

During the night, REM sleep periods become longer. This is because the body goes through several sleep cycles throughout the night, and as the night progresses, the amount of time spent in REM sleep increases.

Question 20

Maxine is currently sleeping.Her breathing and pulse have slowed down,her muscles are relaxed,and she is very hard to rouse.Maxine is in __________ sleep.

Accepted Answer

The description given matches the characteristics of Stage 3 or 4 sleep, also known as deep sleep or slow wave sleep. During this stage, it is difficult to wake someone up and their breathing, heart rate, and muscle activity are all decreased. REM sleep is characterized by rapid eye movements, dreaming, and increased brain activity, so it does not match the given description. Stage 1 and Stage 2 sleep are lighter stages and do not exhibit the same level of relaxation and difficulty in waking up as Stage 3 or 4 sleep.

Quiz 5: Body Rhythms and Mental States