Examlex
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Pineal Gland
A small, pine-cone-shaped endocrine gland in the brain that produces and secretes the hormone melatonin, which regulates sleep patterns.
Hypothalamus
A region of the brain below the thalamus that coordinates both the autonomic nervous system and the activity of the pituitary, controlling body temperature, thirst, hunger, and other homeostatic systems.
REM Sleep
A phase of sleep characterized by rapid eye movements, vivid dreaming, and increased brain activity.
Genital Arousal
The state of sexual excitement and readiness for sexual activity, evidenced by physiological reactions in the genital organs.
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