Multiple choice

A type of hypersensitivity to an allergen in which IgE antibodies attach to mast cells and basophils and may result in circulatory shock and asphyxia, is called

  1. orthopnea

  2. anaphylaxis

  3. rhinitis

  4. immunologic surveillance

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Anaphylaxis is a severe, potentially life-threatening IgE-mediated allergic reaction. IgE antibodies bind to mast cells and basophils, triggering release of histamine and other mediators that cause widespread vasodilation, bronchoconstriction, and can lead to circulatory shock and asphyxia. Orthopnea is breathing difficulty when lying flat.