Examlex
Petrified wood is a type of ________.
Brain Disorders
A broad spectrum of health conditions affecting the brain and nervous system that can impact mental and physical functioning, ranging from epilepsy and dementia to psychiatric conditions like depression.
Serotonin
A neurotransmitter involved in regulating mood, appetite, and sleep, among other functions.
Endorphins
Biochemical compounds in the human body that act as natural painkillers and happiness boosters.
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