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True or False: Lymphadenitis is inflammation of the lymph nodes.

Which of the following is a rickettsial infection of endothelial cells? 

A 45-year-old man with a 10-year history of hypertension experiences a sudden onset of very severe chest pain that radiates to his back. A chest radiograph shows a widened aorta but on CT scan, the lumen of the aorta is not dilated. These findings are most consistent with which of the following? 

An 8-year-old child with a history of asthma is brought to urgent care with acute worsening of wheezing and cough. The patient recently went camping with family friends and slept in a tent. Currently, the patient is talking in phrases, respiratory rate is 24, and expiratory wheezing and mild accessory muscle use is noted. Pulse ox is 96%. The best treatment for this patient in the clinic is-

The best way to detect a pulmonary embolism is by using a chest X-ray.

A blockage in the left main coronary artery is rare but often fatal because it causes death of both the anterior and the lateral walls of the left ventricle.

Which of the following is a large protein that acts to adhere platelets to collagen?

True or False: The Philadelphia chromosome is a translocation between two chromosomes.

Which of the following is a complication after a myocardial infarction?

True or False: Blood will not clot if calcium is absent.