Recall that in the msleep data, the variable sleep_rem represents the average number of hours of REM (rapid eye movement) sleep per day for a species of mammal, while the variable sleep_total represents the average total number of hours per day the mammal spends asleep.

Rapid-eye movement (REM) sleep is associated with which of the following?Question 5Select one:a.Sleep walkingb.Increased brain activityc.Sleep talkingd.All of the above

Which of the following statements is true of REM sleep?Multiple ChoiceIt occupies a little more than 20 percent of adults' total sleeping time.Breathing rate decreases during this period.It is characterized by decreased heart rate and the absence of dreams.The activity of skeletal muscles increases during this period.

During rapid eye movement (REM) sleep,Multiple Choicethe muscles are very relaxed, and body temperature, blood pressure, and heart and respiratory rates are at their lowest levels.the muscles relax, and body temperature, blood pressure, and heart and respiratory rates fall.a person falls into light sleep.a person begins to relax and feels drowsy.the muscles are paralyzed, and body temperature, blood pressure, and heart and respiratory rates increase.

How many stages of non-REM sleep are there?Multiple choice question.4312

Sleep changes over the life course. As we get older, we tend to:Group of answer choicesSpend more time in REM sleepSleep for longerFall asleep more quicklyHave more broken sleep