Nursing Elites

1. Which condition is characterized by the right ventricle of the heart failing due to increased pressure in the lungs, often caused by chronic lung disease?

• A. Cor pulmonale
• B. Pulmonary embolism
• C. Aortic stenosis
• D. Hypertrophic cardiomyopathy

Correct answer: A

Rationale: The correct answer is Cor pulmonale, a condition where the right ventricle of the heart fails due to increased pressure in the lungs, commonly caused by chronic lung diseases like COPD. Pulmonary embolism (choice B) is a blockage in one of the pulmonary arteries in the lungs, usually caused by a blood clot. Aortic stenosis (choice C) is a narrowing of the aortic valve opening that restricts blood flow from the left ventricle to the aorta. Hypertrophic cardiomyopathy (choice D) is a genetic condition where the heart muscle becomes abnormally thick, making it harder for the heart to pump blood.

2. What is the ability of cardiac cells to respond to an impulse by contracting?

• A. Excitability
• B. Contractility
• C. Rhythmicity
• D. Conductivity

Correct answer: A

Rationale: Excitability is the correct term that describes the ability of cardiac cells to respond to an impulse by contracting. Excitability refers to the cell's ability to respond to stimuli and generate an action potential. Choice B, Contractility, is incorrect as it refers to the ability of cardiac cells to contract after receiving a stimulus, not the response to the impulse itself. Choice C, Rhythmicity, is incorrect as it pertains to the heart's ability to contract rhythmically without external stimulation. Choice D, Conductivity, is incorrect as it refers to the ability of cardiac cells to transmit an impulse from cell to cell, not the direct response to the impulse by contracting.

3. What is the ability of cardiac cells to generate an electrical impulse without being stimulated by an external source?

• A. Automaticity
• B. Contractility
• C. Conductivity
• D. Refractoriness

Correct answer: A

Rationale: Automaticity is the correct answer because it refers to the inherent ability of cardiac cells to generate electrical impulses without the need for external stimulation. Contractility (Choice B) is the ability of the heart muscle to contract and generate force, not related to electrical impulse generation. Conductivity (Choice C) refers to the ability of cardiac cells to transmit electrical impulses from cell to cell, not the spontaneous generation of impulses. Refractoriness (Choice D) is the period during which the cardiac cells are recovering and not able to respond to a new stimulus, not the spontaneous generation of impulses.

4. Which condition involves the tearing of the aorta, leading to severe pain and internal bleeding?

• A. Aortic dissection
• B. Aneurysm
• C. Stroke
• D. Myocardial infarction

Correct answer: A

Rationale: The correct answer is Aortic dissection. Aortic dissection is a life-threatening condition where the inner layer of the aorta tears, causing severe chest or back pain and internal bleeding, requiring immediate medical attention. Choice B, aneurysm, involves a bulging or weakening of a blood vessel wall, which is different from a tear in the aorta. Choices C and D, stroke and myocardial infarction, do not directly involve the tearing of the aorta and are distinct conditions.

5. What is a condition where the walls of the arteries become thickened and stiff, often due to the buildup of plaque, leading to reduced blood flow?

• A. Atherosclerosis
• B. Angina
• C. Hypertension
• D. Arrhythmia

Correct answer: A

Rationale: Atherosclerosis is the correct answer. It is a condition characterized by the thickening and stiffening of artery walls due to plaque buildup, which restricts blood flow. Angina (choice B) is chest pain or discomfort caused by reduced blood flow to the heart. Hypertension (choice C) is high blood pressure, not directly related to arterial wall thickening. Arrhythmia (choice D) refers to irregular heart rhythms and is not specifically linked to artery wall changes like atherosclerosis.

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