Which stage shows decreased respiration amplitude with rhythmic breathing?

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Multiple Choice

Which stage shows decreased respiration amplitude with rhythmic breathing?

During non-rapid eye movement sleep, especially the deeper stages, the body relaxes and autonomic activity stabilizes, so breathing becomes slower and more rhythmic with smaller tidal volumes. This decreased amplitude occurs while the rhythm remains steady, reflecting reduced metabolic demand. REM sleep, by contrast, features irregular and variable breathing due to autonomic fluctuations and muscle atonia; wakefulness keeps breathing normal and unaltered by sleep-stage regulation; Stage 2 is a lighter NREM stage where breathing stays fairly regular and not as reduced in amplitude as in deeper sleep. So the pattern described—decreased respiration amplitude with rhythmic breathing—fits NREM sleep.

During non-rapid eye movement sleep, especially the deeper stages, the body relaxes and autonomic activity stabilizes, so breathing becomes slower and more rhythmic with smaller tidal volumes. This decreased amplitude occurs while the rhythm remains steady, reflecting reduced metabolic demand. REM sleep, by contrast, features irregular and variable breathing due to autonomic fluctuations and muscle atonia; wakefulness keeps breathing normal and unaltered by sleep-stage regulation; Stage 2 is a lighter NREM stage where breathing stays fairly regular and not as reduced in amplitude as in deeper sleep. So the pattern described—decreased respiration amplitude with rhythmic breathing—fits NREM sleep.

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