Which of the following statements about REM sleep is true?

• A. It is a much deeper, more restful kind of sleep than non-REM sleep.
• B. It is the stage of sleep in which the heart beats the slowest.
• C. It involves a lot of movement and thrashing as people have vivid dreams.
• D. It is when 90 percent of dreams occur.

Answer: (D)

Verified step by step guidance

1. Understand the characteristics of REM sleep: REM (Rapid Eye Movement) sleep is a unique phase of sleep characterized by rapid movement of the eyes, low muscle tone, and vivid dreams.
2. Differentiate between REM and non-REM sleep: Non-REM sleep is generally considered to be deeper and more restful, whereas REM sleep is associated with increased brain activity and dreaming.
3. Consider physiological changes during REM sleep: During REM sleep, the heart rate can be irregular, and the body is typically in a state of atonia, meaning there is minimal movement.
4. Recognize the role of REM sleep in dreaming: REM sleep is the stage where the majority of dreaming occurs, with approximately 90% of dreams happening during this phase.
5. Evaluate the given statements: Compare each statement with the characteristics of REM sleep to determine which one accurately describes this sleep stage.