Nursing Elites

1. Which term conceptualizes that the greater the myocardial fiber stretch, within physiologic limits, the more forceful the ventricular contraction, thereby increasing stroke volume?

• A. Frank-Starling’s Law
• B. Automaticity
• C. Contractility
• D. Excitability

Correct answer: A

Rationale: The correct answer is A, Frank-Starling’s Law. This law explains that within physiologic limits, the greater the stretch of myocardial fibers, the more forceful the ventricular contraction, leading to an increased stroke volume. Choice B, Automaticity, refers to the ability of cardiac cells to spontaneously generate electrical impulses. Choice C, Contractility, represents the intrinsic ability of the heart muscle to contract. Choice D, Excitability, refers to the ability of cardiac cells to respond to electrical stimuli.

2. What is a life-threatening condition where the heart suddenly stops beating?

• A. Cardiac arrest
• B. Myocardial infarction
• C. Heart failure
• D. Atrial fibrillation

Correct answer: A

Rationale: Cardiac arrest is the correct answer. It is a sudden, unexpected loss of heart function, breathing, and consciousness, typically resulting in death if not treated immediately. Myocardial infarction (choice B) refers to a heart attack caused by a blockage in the coronary arteries. Heart failure (choice C) is a chronic condition where the heart is unable to pump blood efficiently. Atrial fibrillation (choice D) is an irregular and often rapid heart rate that can lead to complications but is not the same as cardiac arrest.

3. What type of heart disease is characterized by the heart muscle becoming enlarged and weakened, reducing its ability to pump blood effectively?

• A. Dilated cardiomyopathy
• B. Hypertrophic cardiomyopathy
• C. Restrictive cardiomyopathy
• D. Myocarditis

Correct answer: A

Rationale: The correct answer is A: Dilated cardiomyopathy. Dilated cardiomyopathy is a type of heart disease where the heart muscle becomes enlarged and weakened, reducing its ability to pump blood effectively, which can lead to heart failure. Hypertrophic cardiomyopathy (B) is characterized by abnormal thickening of the heart muscle, not enlargement. Restrictive cardiomyopathy (C) involves the heart muscle becoming stiff and less flexible, limiting its ability to fill with blood properly. Myocarditis (D) is inflammation of the heart muscle, which can affect the heart's function but is different from dilated cardiomyopathy.

4. This medication type is used to relax and widen blood vessels, improving blood flow and reducing blood pressure.

• A. Vasodilator
• B. Anticoagulant
• C. Diuretic
• D. Beta-blocker

Correct answer: A

Rationale: The correct answer is A: Vasodilator. Vasodilators are medications that work by relaxing and widening blood vessels, which improves blood flow and reduces blood pressure. They are commonly used in the treatment of heart conditions. Anticoagulants (choice B) are medications that prevent blood clot formation, diuretics (choice C) increase urine production to reduce fluid retention, and beta-blockers (choice D) reduce heart rate and workload on the heart. These mechanisms differ from the action of vasodilators.

5. Which of the following is a genetic disorder that causes thick, sticky mucus to build up in the lungs and digestive system, leading to severe respiratory and digestive problems?

• A. Cystic fibrosis
• B. Pulmonary fibrosis
• C. Pulmonary edema
• D. Bronchiectasis

Correct answer: A

Rationale: The correct answer is A, cystic fibrosis. Cystic fibrosis is a genetic disorder characterized by the buildup of thick, sticky mucus in the lungs and digestive system, resulting in severe respiratory and digestive issues. Choice B, pulmonary fibrosis, involves scarring and thickening of lung tissue, not excessive mucus production. Choice C, pulmonary edema, refers to fluid accumulation in the lungs, not mucus buildup. Choice D, bronchiectasis, is a condition where the airways in the lungs are damaged and widened, leading to chronic cough and sputum production, but it does not specifically involve the thick, sticky mucus characteristic of cystic fibrosis.

Similar Questions