Nursing Elites

1. Which artery supplies the right atrium, right ventricle, a portion of the septum, SA node, AV node, and inferior portion of the left ventricle?

• A. Right coronary artery
• B. Left circumflex artery
• C. Posterior descending artery
• D. Aortic artery

Correct answer: A

Rationale: The correct answer is the right coronary artery. It supplies essential areas of the heart, including the right atrium, right ventricle, a portion of the septum, SA node, AV node, and the inferior portion of the left ventricle. The left circumflex artery primarily supplies the left atrium and lateral wall of the left ventricle, not the mentioned areas. The posterior descending artery supplies the inferior wall of the left ventricle, not the right side. The aortic artery is a general term and does not specifically refer to an artery that supplies the mentioned areas.

2. What is a condition where the heart muscle becomes abnormally enlarged, thickened, or stiffened, often leading to heart failure?

• A. Cardiomyopathy
• B. Pericarditis
• C. Aortic stenosis
• D. Mitral valve prolapse

Correct answer: A

Rationale: Cardiomyopathy is the correct answer. It is a condition characterized by the abnormal enlargement, thickening, or stiffening of the heart muscle, which can lead to heart failure. Pericarditis (choice B) is inflammation of the pericardium, the sac surrounding the heart, not directly related to heart muscle enlargement. Aortic stenosis (choice C) is the narrowing of the aortic valve opening, affecting blood flow from the heart, but not directly related to heart muscle enlargement. Mitral valve prolapse (choice D) is a condition where the valve between the left atrium and left ventricle doesn't close properly, causing blood to leak backward, and is not directly related to heart muscle enlargement.

3. Which condition is characterized by the lungs becoming scarred and stiff, leading to difficulty breathing and inadequate oxygen intake into the bloodstream?

• A. Pulmonary fibrosis
• B. Cystic fibrosis
• C. COPD
• D. Tuberculosis

Correct answer: A

Rationale: The correct answer is A, Pulmonary fibrosis. Pulmonary fibrosis is a lung disease where lung tissue is damaged and scarred, resulting in breathing difficulties and decreased oxygen transfer into the bloodstream. Cystic fibrosis (B) is a genetic disorder primarily affecting the lungs and digestive system, not causing lung scarring. COPD (C) includes conditions like chronic bronchitis and emphysema but doesn't specifically involve lung scarring. Tuberculosis (D) is a bacterial infection that primarily affects the lungs but doesn't cause lung tissue scarring and stiffness as seen in pulmonary fibrosis.

4. 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.

5. Which chronic respiratory condition is characterized by the narrowing and inflammation of the airways, leading to difficulty breathing?

• A. Asthma
• B. COPD
• C. Bronchitis
• D. Pneumonia

Correct answer: A

Rationale: Asthma is the correct answer. It is a chronic respiratory condition where the airways become inflamed and narrowed, leading to episodes of wheezing, breathlessness, chest tightness, and coughing. Asthma is characterized by reversible airflow obstruction, differentiating it from COPD, which involves irreversible airflow limitation. Bronchitis is an inflammation of the bronchial tubes without the same reversible airflow obstruction seen in asthma. Pneumonia is an infection of the lung tissue and does not involve chronic inflammation and narrowing of the airways like asthma.

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