Questions: What is the lightest stage of sleep? Stage II Stage I Stage III

What is the lightest stage of sleep? Stage II Stage I Stage III
Transcript text: What is the lightest stage of sleep? Stage II Stage I Stage III
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Solution

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The answer is the second one (or B): Stage I.

Explanation for each option:

  • Stage II: This is not the lightest stage of sleep. Stage II is characterized by sleep spindles and K-complexes and is a deeper stage of sleep than Stage I.
  • Stage I: This is the correct answer. Stage I is the lightest stage of sleep, where a person transitions from wakefulness to sleep. It is a very light sleep, and people can be easily awakened during this stage.
  • Stage III: This is not the lightest stage of sleep. Stage III is a deep sleep stage, also known as slow-wave sleep, and is much deeper than Stage I.

Summary: The lightest stage of sleep is Stage I.

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