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Negative density dependence occurs when the

Low-quality habitat patches are known as ________________ because they produce few individuals and rely on dispersers coming in from other patches to keep the subpopulation from going extinct.

A 31 year old female presents to the UF Health CF Clinic for a second opinion. She was told in the past she might have CF and now she is pregnant. Her sweat chloride test result is 38 mEq/ml. Genetic testing indicates that she is heterozygous for a pathogenic mutation on the CFTR gene. Her husband was tested and found to be mutation negative. The most likely scenario for the future child is what?

A 65 yo male with a smoking history of 3 pack per day presents to the ER complaining of blood in his sputum. The patient states that for the last week, he has noticed some blood every morning when he coughs. He denies any fever or shortness of breath. When asked about other symptoms, he states that he has lost weight, but his appetite is still good. The best test to determine the etiology of his hemoptysis is?

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

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?

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?

The gastrointestinal manifestations of patients with CF including malabsorption, diarrhea, and constipation are secondary to?