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Question 21 When Marisol is running during marathons she gets a runner’s high. During these times she most likely experiences altered consciousness. dopamine release in the brain. automatic processing of the running itself. a shift in her breathing pattern.

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Answered by GPT-5 mini AI
dopamine release in the brain.

Explanation: a runner’s high reflects activation of the brain’s reward/pleasure systems (endorphins and related neurotransmitters such as dopamine), producing euphoria and reduced pain.