How does propranolol (Inderal), a beta blocker medication, control hypertension?
Reduces the sympathetic stimulation in cardiac muscle
Increases the diuretic response in the renal tubules
Inhibits the conversion of angiotensin I to angiotensin II
Blocks alpha receptors throughout the body
The Correct Answer is A
Choice A reason: This is the correct mechanism of action of propranolol. Propranolol is a beta blocker medication, which means that it blocks the beta receptors in the heart and blood vessels. This reduces the sympathetic stimulation in cardiac muscle, which lowers the heart rate, contractility, and oxygen demand. This also reduces the renin release from the kidneys, which lowers the blood pressure.
Choice B reason: This is not the mechanism of action of propranolol. Propranolol does not increase the diuretic response in the renal tubules. This is the effect of diuretic medications, such as furosemide or hydrochlorothiazide, which increase the urine output and decrease the blood volume and pressure.
Choice C reason: This is not the mechanism of action of propranolol. Propranolol does not inhibit the conversion of angiotensin I to angiotensin II. This is the effect of angiotensin-converting enzyme (ACE) inhibitors, such as lisinopril or enalapril, which block the formation of angiotensin II, a potent vasoconstrictor that raises the blood pressure.
Choice D reason: This is not the mechanism of action of propranolol. Propranolol does not block alpha receptors throughout the body. This is the effect of alpha blockers, such as doxazosin or prazosin, which block the alpha receptors in the blood vessels and cause vasodilation, which lowers the blood pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A reason: This is not the cause of pulmonary symptoms in left heart failure. Decreased cardiac output is a consequence of left heart failure, which affects the perfusion of vital organs and tissues.
Choice B reason: This is not the cause of pulmonary symptoms in left heart failure. Bronchoconstriction is a feature of asthma and chronic obstructive pulmonary disease (COPD), which affect the airways and cause wheezes and shortness of breath.
Choice C reason: This is not the cause of pulmonary symptoms in left heart failure. Inflammatory pulmonary edema is a type of non-cardiogenic pulmonary edema, which occurs when the alveolar-capillary membrane is damaged by an inflammatory process, such as pneumonia or sepsis.
Choice D reason: This is the correct cause of pulmonary symptoms in left heart failure. Pulmonary vascular congestion is a result of increased pressure in the pulmonary circulation, which occurs when the left ventricle fails to pump blood effectively to the aorta and the rest of the body. This causes fluid to leak into the alveoli and interstitial spaces, leading to cough, dyspnea, crackles, and pink frothy sputum.
Correct Answer is C
Explanation
Choice A reason: This is not the best response by the nurse. Stopping the medication abruptly can cause rebound hypertension and other complications. The patient should not stop taking the medication without consulting their health care provider.
Choice B reason: This is not the best response by the nurse. Cutting the pill in half and taking a reduced dosage can affect the efficacy and safety of the medication. The patient should not change the dosage of the medication without consulting their health care provider.
Choice C reason: This is the best response by the nurse. Dizziness is a common side effect of ACE inhibitors, especially when the patient changes position or stands up quickly. This is due to the orthostatic hypotension (a drop in blood pressure when standing up) caused by the vasodilation effect of the medication. However, this side effect is usually mild and transient, and can be prevented by rising slowly from a sitting or lying position, drinking plenty of fluids, and avoiding alcohol.
Choice D reason: This is not the best response by the nurse. Scheduling the patient to visit the health care provider today is not necessary, unless the dizziness is severe, persistent, or accompanied by other symptoms, such as chest pain, fainting, or palpitations. The patient should be advised to monitor their blood pressure and report any significant changes or concerns to their health care provider.
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