USMLE Step 1 Quiz
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IMMUNOLOGY
Question 1 of 20
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A 25-year-old woman presents to the emergency department with acute swelling of her lips, tongue, and face that developed over the past few hours. She denies any new food or drug exposures. She reports similar, self-resolving episodes in the past, and her father had similar problems. Physical examination reveals non-pitting, non-pruritic edema. A deficiency in C1 esterase inhibitor is suspected. This deficiency leads to unregulated production of bradykinin due to the uncontrolled activity of which enzyme?
This deficiency leads to unregulated production of bradykinin due to the uncontrolled activity of which enzyme?
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