BIOLOGICAL BASES OF BEHAVIOR
BIOLOGY OF CONSCIOUSNESS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Percent of time in REM sleep decreases
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Percent of time in NREM 3 sleep decreases
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Every sleep cycle is the same
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As morning approaches, you spend 0 time in NREM 2
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Detailed explanation-1: -What happens to NREM-3 sleep as the night goes on? Gets briefer then disappears. How much of an average night’s sleep do we spend in REM? 20-25% of night’s sleep.
Detailed explanation-2: -Stage 3. Stage 3 sleep is also known as N3 or deep sleep, and it is harder to wake someone up if they are in this phase. Muscle tone, pulse, and breathing rate decrease in N3 sleep as the body relaxes even further. The brain activity during this period has an identifiable pattern of what are known as delta waves.
Detailed explanation-3: -Stage N3 is deep sleep and lasts about 20 to 40 minutes. During this stage, delta brain activity increases and you may have some body movements. It is very hard to wake up someone in stage N3.
Detailed explanation-4: -NREM sleep constitutes about 75 to 80 percent of total time spent in sleep, and REM sleep constitutes the remaining 20 to 25 percent. The average length of the first NREM-REM sleep cycle is 70 to 100 minutes.