Why would an individual with atopic allergic asthma experience difficulty breathing?

A. IgE antibodies bind to the inhaled antigens, causing an inflammatory reaction that decreases gas exchange.
B. Mast cells, which stimulate vasodilation of the airways, are less active in persons with allergies.
C. Leukotrienes cause constriction of the bronchioles, producing airway obstruction.
D. All of the choices are correct.


Answer: C

Anatomy & Physiology

You might also like to view...

The common name for the nuchal crest is the __________

Fill in the blank(s) with correct word

Anatomy & Physiology

The canal connecting the third and fourth ventricles and running through the midbrain is the interventricular foramen

Indicate whether the statement is true or false

Anatomy & Physiology

Natural killer cells:

A. are activated by IL-2 and interferon-gamma. B. only attack bacteria. C. cannot interact with antibodies. D. secrete interferon-gamma to activate helper T-cells. E. have primary responsibility for mass-manufacturing antibodies against foreign antigens.

Anatomy & Physiology

How are chemical reactions represented?

A) Reactions are represented by line plots and the line represents the direction of the reaction. B) Reactions are represented by a sine wave and the slope represents the direction of the reaction. C) Reactions are represented by chemical equations and the arrow represents the direction of the reaction. D) Reactions are represented by Lewis structural models and the total number of atoms represents the direction of the reaction. E) Reactions are represented by superscripts and subscripts and the charge represents the direction of the reaction.

Anatomy & Physiology