Xanthine bronchodilators such as theophylline are believed to act by:
a. stimulating adrenergic receptors.
b. increasing the rate of secretion of respiratory tract fluid.
c. increasing the concentration of intracellular cyclic AMP (cAMP).
d. promoting skeletal muscle relaxation.
ANS: C
Feedback
A Incorrect: They stimulate the beta-adrenergic cells.
B Incorrect: They do not increase respiratory tract secretions.
C Correct: They block the enzyme that breaks down cAMP, thus increasing its concentration.
D Incorrect: They promote smooth muscle relaxation.
You might also like to view...
A nurse is demonstrating the correct technique for instilling antibiotic ear drops into a child's ear canal. The nurse should teach the child's caregivers to do which of the following?
A) Have the child lie supine during instillation of the ear drops. B) Have the child lie still for 30 to 45 minutes after instilling the ear drops. C) Place a cotton ball in the ear canal after instilling the ear drops. D) Rinse the child's ear canal with normal saline prior to instilling the ear drops.
A symptom of itching and an uncomfortable sensation leading to an urge to scratch is known as _____________
ANS:
Of the following treatment environments, which would provide the least restrictive setting for an individual with mental illness who is threatening harm to self and others?
A) The community center B) A locked hospital unit C) A group home D) The client's home
John has a communicable disease that requires notification to the department of health. Consider which of John's contacts will require treatment with prophylactic therapy. What is the guideline/recommendation in your state and hospital?
What will be an ideal response?