Answer to Question 1
A
Feedback:
This specificity allows the clinician to select a drug that will have the desired therapeutic effects without the undesired effects that occur when the entire sympathetic nervous system is blocked. In general, however, the specificity of adrenergic blocking agents depends on the concentration of drug in the body. Most specificity is lost with higher serum drug levels.
Answer to Question 2
A
Feedback:
A patient who does not respond to one drug may react successfully to another agent. Responses may also vary because of cultural issues. The selection of a specific drug depends on the desired potency and patient tolerance of the associated adverse effects. It is not common to have a patient who does not demonstrate some improvement from medications so it would be incorrect to tell the mother the child won't respond to any drug after trying only one medication. There is no indication the drug was taken improperly and even properly administered drugs will not work on all patients. Multiple drug therapy is not indicated by the question.
Organizing Drug Information by Pharmacologic Classification
Liposomal amphotericin B: Drug molecules are embedded in the lipid bilayer.
Drug classes used in the pharmacotherapy of asthma.
Landsteiner's experiment demonstrating the exquisite specificity of the immune system.
Structure of the human b2-adrenergic receptor
Drug Approval Stages