What two embryological tissues interact to yield the branching pattern of airway morphogensis in the lungs?

The most common histology seen in non-smokers with lung cancer is

In which cause of hypoxemia will a chest radiograph most likely be abnormal?

  3.4.  This suggests that people were gathering for 4. work/feasts at this time of year. (1)

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Vascular resistance in the alveolar vessels of the lung:

Within the peripheral chemoreceptors, when is the response to a drop in PO2 greatest?

The portal of initial entry for most respiratory fungal pathogens is LEAST likely to be

Which cell type is thought to play a key role in initiating the first phase of an asthma attack, and are thought to be an important target of Cromolyn?

A 26 yo female student presents complaining of a 3 week history of colored nasal discharge, headache, lethargy, and sneezing. She is taking acetaminophen for her headache. She is a non-smoker with no significant medical history or drug allergies, and does not take any other regular medicines. She appears tired and shivery and is constantly blowing her nose. On examination she has unilateral facial pain and tenderness and a temperature of 38.5°C. What is the most likely cause of the damage that results in her symptoms?