Physiology · Muscular System · Hard

Phosphocreatine

Meaning: A high-energy compound stored in muscle that rapidly regenerates ATP during short bursts of exercise.

In practice: Sprinters rely heavily on phosphocreatine for the first few seconds of a race.

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Which word means: The force or strength of heart muscle contraction.

Which word means: A natural opioid-like peptide released in the brain that reduces pain and produces feelings of wellbeing.

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