A 58-year-old man presents with resting leg pain and diminished pulses. He has non-healing ulcers on his toes. What is the most likely diagnosis?

A 46-year-old female presents with fatigue, facial swelling, and muscle weakness. Labs show low cortisol and low ACTH levels. What is the most likely diagnosis?

A patient with asthma is prescribed a β2-agonist. What is the mechanism of action?

A 20-year-old man with schizophrenia is seen mumbling and tilting his head as if listening to someone. What is the best explanation?

A 16-year-old boy presents with proteinuria and hematuria following a streptococcal infection. What is the most likely cause?

A nurse practitioner sees a patient post-MI with persistent muscle twitching and tetany. What electrolyte imbalance should be suspected?

A 26-year-old female presents with a sudden onset of unilateral facial weakness. She is unable to close her left eye or smile on that side. There is no limb weakness or confusion. What is the most likely diagnosis?

A 58-year-old woman with a history of hypothyroidism presents with facial puffiness, coarse dry skin, and hoarseness. Her TSH is elevated, and free T4 is low. What is the most likely explanation?

A 52-year-old male presents with chest tightness, diaphoresis, and ECG changes consistent with a STEMI. His troponin level is significantly elevated. What does troponin elevation indicate?

A 32-year-old man presents with burning epigastric pain that improves with eating. Urea breath test is positive. What is the most likely diagnosis?