Which of the following does not describe a safety mechanism to ensure that only infected cells are attacked by NK cells?
a. The default state is one of active inhibition, which must be overcome by activating signals before killing occurs.
b. Intimate contact with target cells is required.
c. Activating receptors are induced only after encountering an infected cell.
d. No single receptor–ligand interaction induces cytotoxicity, but instead many combinations of receptor–ligand interactions influence the decision to kill or not to kill a target cell.
D
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Indicate whether the statement is true or false
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A) betaxolol B) bimatoprost C) pilocarpine HCl D) acetazolamide
Matt quit smoking, Paul did not. How long will it take for Matt's risk of dying from lung cancer to drop to half of the risk that Paul faces?
A. 1 year B. 6 months C. 5 years D. 10 years
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Answer the following statement true (T) or false (F)