this is a chronic respiratory disease characterized by the irreversible obstruction of airflow
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Cardiovascular System Exam Questions Pdf

1. Which of the following is a chronic respiratory disease characterized by the irreversible obstruction of airflow?

Correct answer: A

Rationale: The correct answer is A, Chronic obstructive pulmonary disease (COPD). COPD is a chronic respiratory disease where the airflow in the lungs becomes obstructed, making it difficult to breathe. Choice B, Asthma, is a different chronic respiratory condition characterized by reversible airflow obstruction and airway hyperresponsiveness. Choice C, Pulmonary edema, is a condition where fluid accumulates in the lungs, leading to difficulty in breathing but not irreversible airflow obstruction. Choice D, Bronchiectasis, is a condition characterized by abnormal widening of the bronchial tubes, leading to recurrent respiratory infections, but it is not specifically defined by irreversible airflow obstruction.

2. What is a severe and often sudden allergic reaction that can lead to breathing difficulties and anaphylactic shock?

Correct answer: A

Rationale: Anaphylaxis is the correct answer. It is a severe allergic reaction that can result in difficulty breathing, a drop in blood pressure, and even anaphylactic shock if not treated promptly. Choice B, allergic rhinitis, is characterized by symptoms such as a runny or stuffy nose, sneezing, and itching. Choice C, bronchospasm, refers to the sudden constriction of the muscles in the walls of the bronchioles, leading to breathing difficulties. Choice D, asthma attack, involves the inflammation and narrowing of the airways, resulting in symptoms like wheezing, coughing, and chest tightness.

3. What is the term for a condition where the lung collapses due to air leaking into the space between the lung and the chest wall?

Correct answer: A

Rationale: Pneumothorax is the correct answer for this question. Pneumothorax is the collapse of a lung caused by the presence of air in the pleural space between the lung and chest wall. This condition can lead to chest pain, shortness of breath, and may require emergency treatment such as chest tube insertion to remove the air. Pleural effusion is the accumulation of fluid in the pleural space, not air. Atelectasis is the collapse or closure of a lung resulting in reduced or absent gas exchange. Pulmonary fibrosis is a condition characterized by scarring and thickening of lung tissue, not related to air leaking into the pleural space.

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

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.

5. What is an infection that causes inflammation in the air sacs of one or both lungs, which may fill with fluid or pus?

Correct answer: A

Rationale: The correct answer is A, Pneumonia. Pneumonia is an infection that inflames the air sacs in one or both lungs, which may fill with fluid or pus, causing symptoms like cough, fever, chills, and difficulty breathing. Tuberculosis (B) is a bacterial infection that primarily affects the lungs but is caused by a different bacterium. Pleurisy (C) is inflammation of the tissues that line the lungs and chest cavity, not the air sacs. Pulmonary edema (D) is a condition where fluid accumulates in the lungs' air sacs but is often due to heart problems rather than an infection.

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