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The indications are generalizations and the actual effect oncontractilitycan depend on various factors and individual circumstances.Here's an indication of whether each itemheart ratewould increase or decrease contractility:Acetylcholine: Decrease ContractilityHyperkalemia: Decrease ContractilityHypercalcemia: Increase ContractilitySympathetic stimulation: Increase ContractilityChronic exercise: Increase ContractilityCardiomyocyte hypertrophy: Increase ContractilityAcute exercise: Increase ContractilityAdrenaline: Increase ContractilityNorepinephrine: Increase ContractilityHypoxia: Increase ContractilityTo know more aboutheart rate:brainly.com/question/29755390#SPj4...