All of the following are associated with hereditary angioedema except _____
a. possible death by suffocation
b. overproduction of vasoactive C2a fragment and peptide bradykinin
c. hyporesponsiveness of classical complement pathway
d. subepithelial edema
e. C1 inhibitor deficiency.
C
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PD-1 is a negative co-stimulatory signal expressed by tumor cells. What advantage would the expression of PD-1 have in a tumor cell avoiding the immune response?
A. None. Tumor cells are recognized as self and therefore do not pose a health threat. B. Tumor cells can avoid being killed by activated TC cells. C. Tumor cells can avoid apoptosis triggered by TH cells. D. Tumor cells avoid phagocytosis by dendritic cells. E. Tumor cells are stimulated to reproduce much faster than tumor cells that do not express PD-1.
Overpopulation is a problem because:
(a) it is difficult to limit human growth (b) Earth's "carrying capacity" may have already been surpassed (c) governments lack the courage to take a stand on population growth (d) humans have yet to experience any ef-fects of their pollution of the environment
The bench press is recommended for older adults for measuring upper body strength
Indicate whether the statement is true or false
________ is a cancer of the hematopoietic tissues that produces a high number of mature and immature white blood cells.
A. Mononucleosis B. Hodgkin disease C. Leukemia D. Hemophilia E. Aplastic anemia