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Explain why warm-up exercises increase myosin-ATPase activity.Describe how increasing myosin-ATPase activity affects muscle contraction.2. Salivary amylase, an enzyme in saliva that breaks down starch, has an optimal pH of 6.7-7.0. Explain why salivary amylase is activein the mouth, but becomes inactive in the stomach.Laboratory Report/ Matthew Walters/ Enzyme Activity/ Tammy Wolfram/ 10.26.2019/ Page  of