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As He Is Running His First 10k (Ten Kilometer) Race

question 72

Multiple Choice

As he is running his first 10k (ten kilometer) race, Apollo finds that he is starting to hurt and wear out at the third mile. He pushes through, and suddenly experiences a brief period where the pain goes away and he can run faster than he had been running. This "runners high" is facilitated by the release of ________.


Definitions:

Photosynthesis

The process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water, producing oxygen as a byproduct.

Support

The action or structure that holds something steady or strengthens it.

Storage

The action or method of retaining or containing something for future use, typically referring to data, energy, or physical goods.

Branches

Extensions or subdivisions that emerge from a main body or system, often used in reference to trees, mathematics, or organizational structures.

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