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Why are primates social?
Endorphins
Natural chemicals in the body that interact with brain receptors to reduce pain perception and boost feelings of pleasure or satisfaction.
Mineralocorticoids
A class of corticosteroids that are involved in regulating sodium and potassium balance in the body.
Prostaglandins
A group of lipids made at sites of tissue damage or infection that are involved in injury and illness processes, such as inflammation.
Bradykinins
Peptides that cause blood vessels to dilate, leading to decreased blood pressure and pain.
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