The definition of a possum, or opossum, is a tree-dwelling nocturnal marsupial with fur and a prehensile tail. A small Australian mammal that lives in a tree and only comes out at night is an example of a possum. possum. possum.
More than two thirds of patients who die of anaphylaxis do so within the first: half hour. ____, a harsh, high-pitched inspiratory sound, occurs when swelling in the upper airway closes off the airway; the swelling can eventually lead to total obstruction. Stridor.
Signs and symptoms of anaphylaxis include: 1  Skin reactions, including hives, itching, and flushed or pale skin. 2  Swelling of the face, eyes, lips or throat. 3  Constriction of the airways, leading to wheezing and trouble breathing.  A weak and rapid 1  pulse. Nausea, vomiting or diarrhea.  Dizziness, fainting or unconsciousness.