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← Human Body & HealthWhich outcome results from hyperthyroidism induced tachycardia via excessive hormone-receptor binding?
A)Increased cardiac inotropy and chronotropy✓
B)Reduced ventricular contractility reserve
C)Decreased cardiomyocyte action potential duration
D)Induced sinoatrial node automaticity reduction
💡 Explanation
Hyperthyroidism causes increased thyroid hormone leading to excessive hormone binding to receptors in the heart, therefore increasing cardiac inotropy and chronotropy via heightened beta-adrenergic signaling, rather than decreasing contractility. Diminished cardiac reserve requires long pathologies.
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