Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Ace your pharmacology exams with "Pharmacology and the Nursing Process" Packed with challenging quizzes based on the renowned textbook Pharmacology and the Nursing Process by Linda Lane Lilley (ISBN: 978-0323827973), it's the perfect tool to test your knowledge and prepare for success.

Start Multiple Choice Practice Test
Start Flash Cards

Practice this question and more.

What mechanism do Xanthine derivatives use to cause bronchodilation?

  1. Blocking ACh receptors

  2. Inhibiting phosphodiesterase to increase cAMP

  3. Decreasing blood glucose levels

  4. Stimulating the release of epinephrine

The correct answer is: Inhibiting phosphodiesterase to increase cAMP

Xanthine derivatives such as theophylline work by inhibiting the enzyme phosphodiesterase, which is responsible for breaking down cAMP, a chemical messenger that helps relax the smooth muscles in the airways and promote bronchodilation. Option A is incorrect because blocking ACh receptors would actually have the opposite effect and cause bronchoconstriction. Option C is incorrect as xanthine derivatives do not have a direct effect on blood glucose levels. Option D is also incorrect as xanthine derivatives do not stimulate the release of epinephrine, although they can be used in combination with epinephrine in certain situations.

More Questions Like This