The perforin-granzyme pathway involves
A) the production of fever, which kills the pathogen.
B) the production of antibodies toward the invading pathogen.
C) the synthesis of special cell-killing proteins that act on infected or abnormal cells.
D) presenting the foreign antigen to B cells.
E) binding CD95L to infected cells, which eventually leads to cell apoptosis.
C
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Which category in the figure above makes available the highest productivity per square meter?
A) tropical wet forest B) open ocean C) algal beds and reefs D) wetlands
Which of the human organs is responsible for
breaking down ethanol and other toxins?
a. stomach b. liver c. small intestine d. pancreas e. spleen
What are responsible for the rapid mobilization of
the immune response after a subsequent attack by a pathogen? a. naive B cells b. naive T cells c. NK cells d. memory cells e. macrophages
An untreated chlamydia infection can lead to a painful condition affecting the uterine tubes, called PID or ___________ inflammatory disease.
Fill in the blank(s) with the appropriate word(s).