Which cell type in this image of a section of lung tissue stained with H&E functions in phagocytosis of bacteria during pneumonia? 

A 16 yo boy was involved in an automobile accident and was directly transported to the UF Health ED. He suffered multiple trauma including long bone fractures. He is hypotensive and requires transfusion of 10 units of blood and 24 liters of normal saline. Twenty four hours later, he becomes acutely short of breath. With FIO2 = 100%, arterial blood gas data are pH = 7.48, PaCO2 = 30 mm Hg, PaO2 = 45 mm Hg, and HCO3- = 23 mEq/L. A chest X-ray shows bilateral infiltrates. Which of the following best describes the status of the patient?

A 23 y/o male with HIV develops bilateral pneumonia. A bronchoalveolar lavage shows “foamy alveolar casts” on H&E stain and “crushed ping pong ball” like organisms on GMS stain. Of the following organisms, which is most likely to be the etiological agent in this immunosuppressed patient?

A 72 yo female presents with cough and hemoptysis. She states that she has been coughing up one to two tea spoonful of blood every 2-3 hours, over the last month. It has been slowly worsening. She has a 90 pack year smoking history and is a current smoker. On physical exam, she has normal vital signs and is not in any respiratory distress. Labs show mild anemia, but is otherwise normal. CXR shows a cavitary lesion which leads to a CT Chest; the image is shown below.  A bronchoscopy guided transbronchial biopsy is performed. What would be the most likely histological appearance of the mass?

A 72 yo man presents to the UF Health ED with acute shortness of breath. Three days prior, he had just returned from a trip to Asia to visit his ailing sister. Since his return, he has not been feeling well, but he has attributed it to jet lag. A number of tests are conducted and the following clinical data are obtained with the patient breathing room air; pH = 7.26, PaO2 = 50 mm Hg, PaCO2 = 48 mm Hg, HCO3- = 21 mEq/L. His physiological dead space is measured and found to be at the predicted value for someone of his age, gender, and height. The mostly likely cause of the hypoxemia is

A 73-year-old woman with a chronic obstructive pulmonary disease, diabetes mellitus, and squamous cell carcinoma of the lung treated with right lower lobectomy in 2005 presents to the outpatient clinic with fevers, chills, myalgias, and headache. She admits to recently attending a social event five days ago, and several other attendees are experiencing similar symptoms. Clinical suspicion for COVID-19 is high, which of the following is the most appropriate medical management?

A 60 year old man with bacterial endocarditis (infection of the heart) develops acute onset of shortness of breath and hypoxemia. A chest x-ray is shown.   Which of the following is the most likely diagnosis?

True real-time story: Dr. Gulig’s daughter-in-law just delivered his second granddaughter. Dr. Gulig and his wife will visit his son’s family within 2 weeks of the baby’s birth. Should Dr. Gulig have gotten a booster for the pertussis vaccine? Why or why not?

A practiced diver is planning a quick dive at the coral reef. Because she is experienced, she forgoes her normal equipment and hyperventilates before her dive. During her dive, all is well and she snaps a few pictures. On ascent, she faints and must be rescued. What is the best explanation for her black out so near the water’s surface?

What is the pathway of respiratory neuronal recruitment during active expiration?