Answer to Question 1
ANS: A
A genetic defect in C1 esterase inhibitor (C1 INH deficiency) results in hereditary angioedema. Hereditary angioedema is due to C1 esterase inhibitor, not neutrophils. Carboxypeptidase de-grades kinins. Plasmin is associated with clots.
Answer to Question 2
ANS: A
Bradykinin increases vascular permeability. It is not associated with vasoconstriction, stimulating the clotting system, or increasing degradation of prostaglandins.