A nurse is caring for a client newly prescribed amlodipine, a calcium channel blocker,…

A nurse is caring for a client newly prescribed amlodipine, a calcium channel blocker, to manage hypertension. Which physiological effect should the nurse expect as the primary mechanism of action of this medication? Increased myocardial contractility by enhancing calcium influx into cardiac muscle cells to improve cardiac output. Relaxation of arterial smooth muscle by inhibiting calcium influx, resulting in vasodilation and decreased blood pressure. Promotion of diuresis by increasing renal calcium excretion to reduce blood volume and pressure. Blockade of beta-adrenergic receptors to reduce heart rate and myocardial oxygen demand.