A 16-year-old female with a history of goiter is admitted with fever, profuse sweating, tachyarrhythmia, hypertension, abdominal pain, and anxiety. Based on a working diagnosis of thyrotoxicosis, she is started on a beta-adrenoceptor antagonist that has a very short half-life. Refer to the case above. Regarding the mechanism by which the drug ameliorates the toxic effects of excessive thyroxine levels, the drug acts as
A) a physiologic antagonist.
B) a competitive receptor antagonist.
C) a noncompetitive receptor antagonist.
D) a partial agonist.
E) an inverse agonist.
A) a physiologic antagonist.
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CTLA-4 is a co-stimulatory receptor on T cells that belongs to the same family as the CD28 co-stimulatory receptor
However, CTLA-4 is antagonistic to CD28 . Which of the following could be a functional advantage of CTLA-4 expression within the immune response? A. CTLA-4 competes with CD28 for ligand binding so that, if CD28 binds to its ligand, the response will be magnified. B. CTLA-4 is often given to immunosuppressed individuals to trigger an immune response. C. CTLA-4 limits the immune response of TC and TH cells after an infection has been cleared. D. CTLA-4 limits TC activity in healthy individuals during a viral infection. E. CTLA-4 reduces the lag time between antigen presentation to a TH cell and B cell activation.
A person with uremia would have a higher-than-normal level for which of these laboratory tests?
A) BUN B) C&S C) PSA D) I&O
Breaking a leg during a football game is an example of which type of injury?
A) overuse B) traumatic C) repetitive D) stress-related
The National Mental Health Association has identified ten characteristics of people who are mentally healthy. List at least seven of these characteristics.
What will be an ideal response?