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85. The sleep stage that is a transition from wakefulness to sleep and lasting

1-7 minutes is:
(A) REM sleep
(B) Stage 1 sleep
(C) Stage 2 sleep
(D) Stage3sleep
(E) Stage 4 sleep

User Siamii
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Final answer:

Stage 1 sleep is the transition phase from wakefulness to sleep lasting a brief period of 1-7 minutes. Stage 2 is characterized by sleep spindles and K-complexes, and Stage 3 is deep sleep marked by delta waves.

Step-by-step explanation:

The sleep stage that is a transition from wakefulness to sleep and lasts 1-7 minutes is known as Stage 1 sleep.

This stage serves as a transitional phase where a person drifts off to sleep, experiencing a slowdown in respiration and heartbeat.

Sleep spindles and K-complexes, however, are most often associated with Stage 2 sleep and are indicative of a deeper level of sleep where the body goes into a state of deeper relaxation.

As we progress into Stage 3 sleep, often referred to as deep sleep or slow-wave sleep, brain wave patterns exhibit low frequency, high amplitude delta waves, and it becomes more difficult to awaken the individual.

User Fuk
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