Test_4 Old Exams.docx - PRINTABLEVERSION Test4...

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PRINTABLE VERSION Test 4 You scored 100.11 out of 106 Question 1 Your answer is CORRECT. Which of the following should be free from microbes in a healthy individual? A)     nose B)     mouth C)     skin D)     cerebrospinal fluid E)     gastrointestinal tract Question 2 Your answer is CORRECT. An organism found on human skin that derives benefit from the host but  does  not  harm it is described as a/an: A)     parasite B)     commensalistic organism C)     opportunistic pathogen D)     pathogen E)     mutualist Question 3 Your answer is CORRECT. Which of the following  is not  associated with innate immunity? A)     Interferon secretion B)     Action of natural killer cells C)     Activation of cytotoxic T cells D)     Engulfment of bacteria by neutrophils E)     All are associated with innate immunity Question 4 Your answer is CORRECT.
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Which of the following  is not  an integral part of the inflammatory process? A)     dilation of blood vessels B)     release of histamines, bradykinin, and prostaglandins C)     extravasation D)     decrease in the permeability of blood vessels in the area E)     release of cytokines to attract cells of the immune system Question 5 Your answer is CORRECT. Natural killer cells target: A)     infected cells that have lost MHC surface proteins B)     bacterial cells that are coated with complement C)     infected cells bound with antibody D)     extracellular viruses E)     All the above Question 6 Your answer is CORRECT. Which is  not true  of opsonization? A)     It requires the presence of phagocytic cells B)     It involves antibodies C)     It can destroy encapsulated bacteria D)     It is strictly a part of the adaptive immune response E)     Two of the above are not true. Question 7 Your answer is CORRECT. Which of the following pairs  is mismatched ? A)     Interferons: secreted by eukaryotic cells in response to intracellular  infection, specifically viral infections. B)     Toll-like receptors: they directly kill pathogens C)     Defensins: form channels in bacterial cytoplasmic membranes,  ultimately killing the cell D)     Exogenous pyrogen: leads to an increase in the hypothalamic  temperature set point E)     Complement: more effective against Gram-negative cells
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Question 8 Your answer is CORRECT. A woman falls and suffers a cut on her leg. The cut went through her skin and  she is bleeding. Which of the following defense mechanisms will participate in  eliminating contaminating microbes?
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