Chapter 4: Lesson 4.1 Understanding Sleep 23-24

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Draggable item		Corresponding Item
sleep-wake cycle		people who can function well on less sleep than other people
melatonin		naturally occurring physical, behavioral, and mental
blue light		hormone that increases feelings of relaxation and sleepiness and signals that it is time to go to sleep
circadian rhythms		type of light from many digital devices, such as phones, tablets, televisions, and computers, that produces large amounts of energy
sleep deprived		active stage of sleep during which your breathing changes, your heart rate and blood pressure rise, and your eyes dart around rapidly
sleep deficit		fatigue that people feel after changing time zones when they travel
jet lag		pattern of sleeping in a 24-hour period
short sleepers		condition that occurs when people frequently get less sleep than they should
REM sleep		term used to describe a person who gets inadequate amounts of sleep

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The Importance of Sleep
How did you feel when you woke up this morning? Did you spring out of bed to face the new day, feeling completely refreshed and rested? Did you hit the snooze button a few times before crawling out of bed, dragging yourself to school, and nearly nodding off in class? How much sleep you get can affect your overall health and wellness (Figure 4.1).

Why Is Sleep Important?

1. _______ 
2. _______ 
3. _______ 
4. _______ 
5. _______ 
6. _______ 

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The Importance of Sleep

  If you felt completely refreshed, you likely got an _______  amount of sleep. This means that you got enough sleep to function properly throughout the day. If you find yourself falling asleep in class, however, you likely got an _______  amount of sleep. This means you did not get enough sleep to function. _______  is another term for inadequate. A person who is _______  gets inadequate amounts of sleep.
         Getting enough sleep is just as important to _______  as eating well or being physically active. If you do not get enough sleep during the week, you cannot make up for it by sleeping in on the weekend. Getting _______  on a regular basis can lead to health _______ , _______ , and _______  in both school and athletics. For example, people who do not get enough sleep are more likely to get _______  and other types of _______ . People who drive while drowsy are just as likely to have an accident as those who drive while drunk. Students who do not get enough sleep often have trouble paying attention in class.

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Sleep Needs and Age
    The amount of sleep that a person needs depends on the individual's age (Figure 4.2). _______ , _______ , and _______  need considerably more sleep than adults need. Young people need _______  because their bodies and brains are still developing. _______  the _______  and helps young people _______ .

    Some people may need more or less sleep than others. For example, some people are _______ , meaning they can _______  well on less sleep. These people often feel fully awake after sleeping for only _______ . Other people may need more than 9 hours of sleep to feel fully rested.

     Think about how much sleep you usually get each night. Do you get enough sleep according to the amounts identified in Figure 4.2? Not meeting these sleep requirements causes people to experience a _______ . This means that they frequently get less sleep than they should. People might experience a sleep deficit for a variety of reasons. They may go to sleep too late based on when they have to wake up in the morning. Over time, a sleep deficit can result in health concerns.

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Mid Lesson Check-In: Take a moment to reflect on your understanding of the material covered in this lesson.

On a scale of 1 to 5, with 1 being 'I'm completely lost' and 5 being 'I understand everything perfectly,' how would you rate your comprehension at this point?

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The Science of Sleep
     The _______  and _______  are very active during sleep, and this activity is _______  to staying healthy. This healing activity cannot occur unless you sleep. Systems in your body help you get this necessary rest. Certain mechanisms, or processes, in the body control when you feel tired and when you feel awake. These mechanisms include _______  and the release of hormones such as melatonin.
      _______  are naturally occurring physical, behavioral, and mental changes in the body that typically follow the 24-hour cycle of the sun (Figure 4.3). For example, the body’s temperature drops during the night and rises during the day. Most circadian rhythms are controlled by the body’s master biological “clock.” This “clock” controls circadian rhythms such as the following:
_______ 
_______ 
_______ 
      

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When does the body start secreting melatonin to help encourage sleep?

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   The _______  is a person's pattern of sleeping in a _______ . The biological clock regulates the sleep-wake cycle in two ways. First, it monitors the amount of _______ . If it senses light, the _______  sends signals in the body that result in activity. If there is less light, the biological clock can send signals to make the _______ . The biological clock also causes a gland located in the brain to release the hormone melatonin when it gets dark. _______  increases feelings of relaxation and sleepiness and signals that it is time to go to sleep.

   When the _______  is disrupted, the body’s biological clock takes a while to readjust. This explains _______ , which is a fatigue that people feel after _______  when they travel. When people travel by plane from California to New York, their bodies feel like they “lost” three hours. When their alarms ring the next morning at 7 a.m. in New York, they are tired because it is only 4 a.m. in California according to their biological clocks. Working _______ , adjusting the clock for daylight savings, or simply being exposed to blue light (_______ ) at night can trick your body into an unnatural circadian rhythm (Figure 4.4).

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Stages of Sleep

   Each night, you usually pass through four distinct stages of sleep (Figure 4.5). These four stages include non-REM and REM sleep. A complete sleep cycle lasts about 90 to 110 minutes. Over the course of a night, you go through this sleep cycle about four to five times, depending on how long you sleep. The amount of time you spend in each stage of sleep, however, changes as the night progresses.

   When a person first falls asleep, they are in non-REM (non-rapid eye movement) sleep. Non-REM sleep is broken out into the first three stages of sleep as follows:

_______  occurs when a person gets drowsy and makes the transition from being awake to falling asleep.
_______  is a period of light sleep. In this stage, eye movement stops, heart rate slows, and the body begins to relax.
_______  is referred to as deep sleep. This stage is needed for a person to feel rested for the next day.

   After the final stage of _______ , a person enters the REM (_______ ) sleep stage. The first period of REM sleep usually occurs about _______  after you fall asleep. REM sleep is an active stage of sleep during which a person’s breathing changes and becomes irregular, shallow, and more rapid. Heart rate and blood pressure also rise. A person’s _______  about rapidly from side to side under the eyelids, and muscles are temporarily paralyzed.
  
   The _______  cycles of the night contain relatively short REM periods and long periods of deep sleep (_______ ). The periods of REM sleep get longer with each sleep cycle, while the deep sleep periods get shorter.
   
   There are _______  available that track users’ sleep cycle patterns (Figure 4.6). These apps can identify if the user is getting enough good quality sleep. They also offer techniques and tools for falling and staying asleep. They can even wake the user at the ideal time, while entering the first stage of sleep. It is important to note, however, that many sleep experts do not believe that a sleep app can provide reliable, accurate data regarding a person’s quality of sleep.

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During which stage of sleep does your blood pressure lower?

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Dreaming

Even though you may not remember your _______ , you do dream every night. On most nights, people spend more than two hours dreaming. Many of these dreams will last between _______ . What a person dreams about, however, _______  from night to night. Sometimes dreams may closely relate to what is going on in someone’s _______ . At other times, dreams may appear _______ .

Although most dreams occur during _______ , they can also occur during other sleep stages (Figure 4.7). _______  that occur during REM sleep—when the brain is particularly active—are very vivid. People who wake up at the end of a REM sleep period are more likely to remember their dreams.

How dreams influence a _______  (mental) and physical well-being is unclear because it is difficult to study dreams. This difficulty is because people often forget most of their dreams. Some sleep researchers believe that dreams play a valuable role in daily life. Dreams may provide important information about a person’s deepest feelings, thoughts, and motives. Researchers believe dreams help people do the following:
remember _______ 
_______  conflicts
regulate their _______ 

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Exit Ticket:💡 Something interesting I learned today was _______ . 

Chapter 4: Lesson 4.1 Understanding Sleep 23-24

🔔 Bell Ringer: As you come in follow these instructions

SEL Check: 🌟 How are you feeling today? Please select the emoji that best represents your mood.

The Importance of Sleep

Sleep Needs and Age

Mid Lesson Check-In: Take a moment to reflect on your understanding of the material covered in this lesson. On a scale of 1 to 5, with 1 being 'I'm completely lost' and 5 being 'I understand everything perfectly,' how would you rate your comprehension at this point?

The Science of Sleep

When does the body start secreting melatonin to help encourage sleep?

During which stage of sleep does your blood pressure lower?

🔔 Bell Ringer: As you come in follow these instructions

SEL Check: 🌟 How are you feeling today? Please select the emoji that best represents your mood.

The Importance of Sleep

Sleep Needs and Age

Mid Lesson Check-In: Take a moment to reflect on your understanding of the material covered in this lesson. On a scale of 1 to 5, with 1 being 'I'm completely lost' and 5 being 'I understand everything perfectly,' how would you rate your comprehension at this point?

The Science of Sleep

When does the body start secreting melatonin to help encourage sleep?

During which stage of sleep does your blood pressure lower?

Mid Lesson Check-In: Take a moment to reflect on your understanding of the material covered in this lesson.

On a scale of 1 to 5, with 1 being 'I'm completely lost' and 5 being 'I understand everything perfectly,' how would you rate your comprehension at this point?

Mid Lesson Check-In: Take a moment to reflect on your understanding of the material covered in this lesson.

On a scale of 1 to 5, with 1 being 'I'm completely lost' and 5 being 'I understand everything perfectly,' how would you rate your comprehension at this point?