Which of the following is not a characteristic of staphylococcal enterotoxins?
a. They bind to MHC class I molecules and T-cell receptors.
b. They cause T cells to divide and differentiate into effector T cells.
c. They stimulate between 2% and 20% of the total T-cell population.
d. They cause excessive synthesis and release of cytokines.
e. They induce suppression of the immune response by causing T cells to undergo
A
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Which of the following is (are) disadvantage(s) of using directly labeled probes in FISH?
A) Less nonspecific binding B) Less background staining C) Fewer steps in the procedure D) Less signal strength E) All of the above
Antioxidants
A. cause cancer. B. found in foods can help protect the body from damage caused by free radicals. C. are a particular type of phytochemical. D. are a particular type of phytochemical found in foods and can help protect the body from damage caused by free radicals. E. None of these statements is true.
A hormone made by the thyroid gland:
A) influences adrenocortical function. B) controls body pigmentation. C) stimulates release of milk. D) influences bone and calcium metabolism.
Parasympathetic means ________ the sympathetic system.
A. under B. over C. beside D. after