Antibodies do all the following except
activate the complement cascade.
neutralize antigens to prevent binding to host cells.
increase phagocytosis by agglutination of antigens.
activate killing by T cytotoxic cells.
increase phagocytosis by opsonization.
activate killing by T cytotoxic cells.
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Which of the following statements about negative selection during lymphocyte development is most accurate?
A. The mechanism of negative selection is the death of cells whose antigen receptors are not stimulated by self antigens. B. The mechanism of negative selection is apoptosis actively induced by antigen-receptor recognition of self antigens. C. Negative selection ensures a self MHC restricted repertoire of T lymphocytes. D. Negative selection occurs only in T cell maturation and not in B cell maturation. E. The major mechanism of negative selection is inhibition of antigen receptor expression.
Which of the following terms is misspelled?
A) ureterral B) pyelitis C) nephrolithiasis D) hemodialysis
An abnormal increase in the number of erythrocytes due to uncontrolled production is known as ________
A) polycythemia vera B) leukemia C) anemia D) embolism
Even though alcohol is a relaxant, explain why alcohol is not an appropriate choice for reducing stress