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Parotid secretion of alpha-amylase and potassium (K+) was determined in young adults following intense exercise. Exercise stress led to a significant elevation in alpha-amylase and K+ secretion, indicating an activation of adrenergic receptors supplying the parotid gland. Evidence of circadian variation or adaptation over days was not found.
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Gilman et al. (1979) studied this question.
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