What type of therapy delivers high concentrations of oxygen to the lungs?

Correct Answer: A

Rationale: The correct answer is A: Oxygen therapy. This type of therapy delivers high concentrations of oxygen to the lungs to improve oxygen levels in the blood. Ventilator therapy (B) involves mechanical breathing assistance, not just oxygen delivery. Mechanical ventilation (C) is a broader term encompassing various types of mechanical respiratory support beyond just oxygen. CPAP therapy (D) is continuous positive airway pressure used to treat sleep apnea, not specifically for delivering high concentrations of oxygen. Therefore, oxygen therapy is the most direct and specific choice for delivering high concentrations of oxygen to the lungs.

Correct Answer: A

Rationale: The correct answer is A: Pneumonia. Pneumonia is an infection that inflames the air sacs in the lungs, causing them to fill with fluid. This leads to symptoms such as cough, fever, and difficulty breathing. Bronchitis (B) is inflammation of the bronchial tubes, not the air sacs. Tuberculosis (C) is a bacterial infection that primarily affects the lungs but does not always lead to fluid accumulation. Cystic fibrosis (D) is a genetic disorder that affects the lungs but does not involve infection or fluid accumulation in the air sacs.

Correct Answer: A

Rationale: The correct answer is A: Anaphylaxis. Anaphylaxis is a severe and sudden allergic reaction that can lead to breathing difficulties and anaphylactic shock due to the body's extreme immune response. Allergic rhinitis (B) is a milder allergic reaction affecting the nose and eyes. Bronchospasm (C) is a sudden constriction of the muscles in the airways, often associated with asthma. Asthma attack (D) refers to the exacerbation of asthma symptoms but does not necessarily involve anaphylactic shock.

Correct Answer: A

Rationale: The correct answer is A: Emphysema. Emphysema is a condition where the lung's air sacs are damaged and enlarged, leading to breathlessness. This occurs due to the destruction of the alveoli walls, causing reduced surface area for gas exchange and airflow obstruction. Chronic bronchitis (B) involves inflammation of the bronchial tubes, not alveoli damage. Asthma (C) is characterized by airway inflammation and bronchoconstriction, not alveoli damage. Pulmonary fibrosis (D) is scarring of lung tissue, not enlargement of the alveoli.

Correct Answer: A

Rationale: The correct answer is A: Echocardiogram. An echocardiogram uses sound waves to create images of the heart, providing information on its structure and function. It helps doctors assess the heart's pumping ability, valve function, and overall health. MRI (B) uses magnets and radio waves to create detailed images but does not rely on sound waves. CT scan (C) uses X-rays to produce images and is not specific to the heart. X-ray (D) provides a basic image of the heart but lacks the detail and functionality assessment of an echocardiogram.