Examlex
Contrast the sizes and membership of the Local Group and Virgo Cluster.
REM Sleep
A stage of sleep characterized by rapid eye movements, more dreaming, and bodily movement; considered important for emotional regulation and memory consolidation.
Mammals
Warm-blooded vertebrate animals characterized by the presence of mammary glands, which females use to feed their young.
Chronic Sleep Deprivation
A condition characterized by consistently not achieving enough sleep, leading to significant negative health and cognitive effects.
Stress Hormone
Biochemical substances, such as cortisol, released into the body in response to stress, affecting various bodily functions.
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