Examlex
Which of the following substances is not a mineral: gold, water, ice? Why?
White Noise
A consistent background noise that masks other sounds, often used to aid concentration or sleep.
Medulla
The base section of the brainstem involved in automatic functions such as breathing, heart rate, and blood pressure.
Thalamus
A brain structure that acts as a relay center, channeling sensory information to the cerebral cortex and regulating consciousness, sleep, and alertness.
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, and involved in sleep and emotional activity.
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