Derek is preparing for the upcoming football season by hitting the gym every day. His coach advises him to see a dietician to make sure he's eating properly to support his lifestyle. After keeping a food record, he calculates that he eats an average of about 405 grams of carbohydrates and 205 grams of protein each day. Derek is 1.88 meters and about 80 kg. Working out he's been feeling sluggish, sometimes dragging himself through practice. A trainer at the gym overhears Derek commenting on his concern about consuming too little protein and suggests trying one of the protein powders sold by the gym.

A41-year-old man comes to the clinic complaining of a chronic cough over the past 4 months, which has now been accompanied by haemoptysis. he denies smoking or any past medical history. on physical examination, his head and neck examination is normal. his lungs have diffuse bilateral rales. cardiac examination is normal. laboratory findings reveal na 142 meq/l, k 4.2 meq/l, cl 110 meq/l, hco3 24 meq/l, bun (blood urea nitrogen) 39 mg/dl, creatinine 2.9 mg/dl. urinalysis reveals microscopic haematuria and 4+ proteinuria. which of the following serologic blood tests would most confirm the suspected diagnosis? - anti-glomerular basement membrane antibodies- anti-mitochondrial antibodies- anti-neutrophilic antibodies- anti-parietal cell antibodies- anti-smooth muscle antibodies