Airway hyperresponsiveness in asthma is related to:
a. increased sympathetic nervous system re-sponse.
b. the release of stress hormones.
c. exposure to an allergen causing mast cell degranulation.
d. hereditary decrease in IgE responsiveness.
ANS: C
Hyperresponsiveness is due to mast cell degranulation. An increased sympathetic response would lead to bronchiolar dilation. Hyperresponsiveness is not due to release of stress hormones. Hered-ity is associated with asthma, but the problem is the mast cells.
You might also like to view...
Acute conjunctivitis is caused by allergens and is not highly infectious.
Answer the following statement true (T) or false (F)
Convert the following temperatures to either Celsius or Fahrenheit. 99.6°F
What will be an ideal response?
Which of the following actions is part of the correct use of a nonrebreather mask on an adult patient?
a. Ensuring that the reservoir fully collapses with each breath b. Instructing the patient to take deeper breaths when the mask is on c. Setting the oxygen flow rate to between 6 LPM and 16 LPM. d. Fully inflating the reservoir before placing the mask on the patient.
Which of the following is an Internet address within a document or e-mail that is bolded or underlined and will open a Web page when it is clicked on?
a. attachment b. hyperlink c. icon d. pixel