During the execution of a test, the urticarial papule that forms at the sites of positive tests results from the release, among others, of: a) arg...

During the execution of a test, the urticarial papule that forms at the sites of positive tests results from the release, among others, of:

a) arginine.
b) histamine.
c) norepinephrine.
d) catecholamine.
a) arginine.
b) histamine.
c) norepinephrine.
d) catecholamine.