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Which physiologic theme best unifies primary hypertension?

A 58-year-old with “stones, bones, groans” has Ca²⁺ 11.8 mg/dL and low phosphate. Which additional finding is most consistent with primary hyperparathyroidism?

A 29-year-old with 7 weeks of amenorrhea, unilateral pelvic pain, and spotting has β-hCG of 4,200 mIU/mL. Transvaginal ultrasound shows no intrauterine gestational sac. Best interpretation?

A 74-year-old presents with memory loss, disorientation, and impaired executive function. Alzheimer’s disease is characterized pathophysiologically by:

Which site is the primary location where B lymphocytes mature and acquire their antigen-specific B-cell receptor (BCR)?

Which statement about chlamydial infection of the upper genital tract is true?

Long-standing GERD confers greatest increased risk for which esophageal pathology?

A 21-year-old with fever, headache, photophobia, and neck stiffness has CSF: WBC 650 (90% neutrophils), protein 300, glucose 28 (serum glucose 95). Most consistent with:

Painful clusters of vesicles on an erythematous base that ulcerate on the labia majora; recurrent episodes. Best confirmatory test?

A gravida 2, para 0 woman is Rh-negative; her first pregnancy ended at 20 weeks with an Rh-positive fetus. She now presents at 10 weeks with a viable Rh-positive pregnancy. Which statement best explains the role of Rho(D) immune globulin (RhIg)?