Why Do We Sleep?

by Vocafy Verificeret

Engelsk (US) B1 15 spørgsmål Health

Discover how sleep helps your body and brain, what affects your rest, and what we still do not know about dreams.

1. 1. Vælg det rigtige svar.

   Which change is most likely after too little sleep?

   Maya stayed up very late. This morning, she keeps losing her place while reading.

   • It becomes harder to focus.
   • She needs less sleep the next night.
   • She feels more alert all day.

   Show solution

   • It becomes harder to focus.

   Too little sleep can affect attention, making everyday tasks harder to complete.

2. 2. Vælg det rigtige svar.

   How is sleep different from switching off a machine?

   While you sleep, you keep breathing and your brain continues to work.

   • Every part of the body stops working.
   • The body stays active in some ways.
   • The brain works only when you dream.

   Show solution

   • The body stays active in some ways.

   Sleep is an active process: your brain and body still carry out important jobs.

3. 3. Udfyld det tomme felt.

   Sleep supports the body's recovery after daily activity.

   During sleep, the body can ___ damaged tissue.

   • weaken
   • damage
   • repair

   Think about how the body recovers.

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   During sleep, the body can repair damaged tissue.

   This is one reason good sleep matters after exercise.

4. 4. Vælg det rigtige svar.

   Why does enough sleep matter for staying healthy?

   Sleep supports the immune system, which helps protect the body from illness.

   • It supports the body's defenses.
   • It guarantees that you will never get sick.
   • It removes the need for vaccines.

   Show solution

   • It supports the body's defenses.

   Sleep supports your defenses, but it cannot prevent every illness.

5. 5. Vælg det rigtige svar.

   What does the body's internal clock help control?

   Your body follows a daily rhythm, even without a clock on the wall.

   • The exact time that everyone must go to bed.
   • The ability to stay awake without needing sleep.
   • When you tend to feel sleepy or awake.

   Think about changes that repeat each day.

   Show solution

   • When you tend to feel sleepy or awake.

   People's daily rhythms can differ, so not everyone feels sleepy at the same time.

6. 6. Udfyld det tomme felt.

   Morning daylight tells your body clock that the day has begun.

   Bright morning light is a signal that it is time to be ___.

   • asleep
   • awake
   • dreaming

   Show solution

   Bright morning light is a signal that it is time to be awake.

   Outdoor daylight is usually brighter than indoor light, even on cloudy days.

7. 7. Vælg det rigtige svar.

   How can sleep help with learning the speech?

   You practice a short speech and then get a good night's sleep.

   • It can teach you parts you never practiced.
   • It can remove your need to practice again.
   • It can help strengthen your memory of it.

   Think about what happens to information you have already learned.

   Show solution

   • It can help strengthen your memory of it.

   Sleep helps the brain build memories, but it does not replace practice.

8. 8. Udfyld det tomme felt.

   Lighter sleep, deeper sleep, and REM sleep repeat during the night. Together, these stages form a sleep ___.

   • cycle
   • habit
   • problem

   The stages return rather than happening only once.

   Show solution

   Lighter sleep, deeper sleep, and REM sleep repeat during the night. Together, these stages form a sleep cycle.

   The amount of time spent in each stage changes across the night.

9. 9. Vælg det rigtige svar.

   What can happen during REM sleep?

   REM is short for "rapid eye movement." It is one stage of sleep.

   • The eyes stay completely still.
   • The eyes move behind closed eyelids.
   • The person must open their eyes.

   Show solution

   • The eyes move behind closed eyelids.

   During REM sleep, most of the body's muscles are usually very relaxed.

10. 10. Vælg det rigtige svar.

    Why might Noah find it harder to fall asleep?

    Noah drinks coffee late in the evening. He plans to go to bed soon.

    • Caffeine helps the body enter deep sleep faster.
    • Coffee's effect always ends after a few minutes.
    • Caffeine can keep him alert for hours.

    Coffee's effects can last beyond the time spent drinking it.

    Show solution

    • Caffeine can keep him alert for hours.

    Caffeine can block some of the brain's signals that make you feel sleepy.

11. 11. Vælg det rigtige svar.

    What is the most likely reason Ella is not sleepy?

    Ella takes a long nap in the early evening. At her usual bedtime, she does not feel ready to sleep.

    • The nap reduced her need for sleep for a while.
    • Any nap permanently damages the body's clock.
    • Sleeping earlier makes the body need more sleep immediately.

    She has already had some rest.

    Show solution

    • The nap reduced her need for sleep for a while.

    Your need for sleep builds while you are awake and falls while you sleep.

12. 12. Vælg det rigtige svar.

    What is the safer response?

    Lena feels sleepy while driving. She thinks opening a window will make it safe to continue.

    • Keep driving with cold air on her face.
    • Stop in a safe place and get some sleep.
    • Keep driving and rely on loud music.

    Show solution

    • Stop in a safe place and get some sleep.

    Cold air and loud music do not reliably prevent a tired driver from falling asleep.

13. 13. Vælg det rigtige svar.

    Why might this person's sleep still be poor?

    A person feels sleepy after drinking alcohol and falls asleep quickly.

    • Falling asleep quickly always prevents waking later.
    • Alcohol removes the body's need for deep sleep.
    • Alcohol can cause more waking later in the night.

    Falling asleep and staying asleep are different.

    Show solution

    • Alcohol can cause more waking later in the night.

    Feeling sleepy does not always lead to good-quality sleep.

14. 14. Vælg det rigtige svar.

    What does Sam's experience suggest about good sleep?

    Sam spends plenty of time in bed but wakes often. The next day, Sam still feels tired.

    • Sleep quality matters as well as sleep time.
    • Time in bed always equals time asleep.
    • Waking often always means someone has slept too much.

    Consider both the length of the night and how it went.

    Show solution

    • Sleep quality matters as well as sleep time.

    Frequent waking can break up sleep, even during a long night.

15. 15. Vælg det rigtige svar.

    Which statement best matches what we know about dreams?

    Dreams may help us deal with feelings or explore situations. Scientists are still studying these ideas.

    • All dreams are warnings about future events.
    • The exact purpose of dreams is still uncertain.
    • Every dream has one clear meaning for everyone.

    Notice the difference between a possible explanation and a proven fact.

    Show solution

    • The exact purpose of dreams is still uncertain.

    We know many things about sleep, but ideas about why we dream are still being tested.