help explain why soldiers and athletes continue to fight, sometimes without feeling any pain, despite horrific injuries.

Endorphins

Explanation:

Endorphins are known as peptides which are produced in various parts of the body such as the central nervous system and pituitary gland.

Endorphins help as a pain reliever and are responsible for happy mood. This helps explain why soldiers and athletes continue to fight, sometimes without feeling any pain, despite horrific injuries.

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