Question

The brain is most active during which portion of each sleep cycle?
A. the beginning of each sleep cycle
B. the middle of each sleep cycle
C. the end of each sleep cycle
D The brain is not active during the sleep cycle.
Please select the best answer from the choices provided
A
B
С
D

Answer 1

Your brain is more active during rem sleep which occurs in the first 90 minutes after falling asleep.

Answer 2

The brain is most active during the portion of each sleep cycle - C. the end of each sleep cycle.

The sleep cycle is the four-stage cycle of awake, light sleep, deep sleep, and REM sleep in the respective order in each cycle of sleep. REM is the stage which is known for the brain is being most active.

• The rapid eye movement (REM) stage starts about 90 minutes after you fall asleep.
• Brain activity increases, your eyes dart around quickly, and your pulse, blood pressure, and breathing speed up.
• REM sleep is important for learning and memory.

Thus, the brain is most active during the portion of each sleep cycle - C. the end of each sleep cycle.

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