Respiratory Quiz #3, Alveolar Anatomy and Physiology  

1. A 28-year-old man is brought to the emergency department after a diving accident. He is diagnosed with a pneumothorax on the right side. Which of the following changes in alveolar anatomy is most directly responsible for the observed decrease in oxygenation? 

Question 1 of 5

2. A researcher is studying the effect of various substances on alveolar surface tension. She notes that one substance significantly reduces surface tension, promoting alveolar stability and preventing collapse. This substance most closely mimics the action of which of the following components of the lung? 

Question 2 of 5

3. A 65-year-old man with chronic obstructive pulmonary disease (COPD) presents with increased difficulty breathing. His condition is characterized by the destruction of alveolar walls and loss of elastic recoil. This pathological change most directly impacts which of the following aspects of alveolar physiology? 

Question 3 of 5

4. During a physiology lecture, a medical student learns that oxygen transport from the alveoli into the blood is primarily driven by a concentration gradient. This process is known as: 

Question 4 of 5

5. A patient with acute respiratory distress syndrome (ARDS) is noted to have a significant increase in the thickness of the alveolar-capillary membrane. This alteration most likely results in which of the following physiological changes? 

Question 5 of 5


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