Quiz 10 - Bio 221 Fall 2010 Name Z’ec Quiz 10 1 Which of...

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Unformatted text preview: Bio 221 Fall 2010 Name Z’ec/ Quiz 10 1. Which of the following best describes the function of a superantigen toxin? , Sound: my“, Luv! Ta» 't. Ark/L A. It is a very strong antigen against which many antibodies are produced. / B. It binds to human epithelial cells and causes a Type II hypersensitivity reaction. C. It links APCs to random T cells, causing the T cells to release cytokines. D. Its B part binds to B cells and its A part interferes with B cell signaling.6 mg km»; E. It destroys connective tissue between cells in tissues, allowing bacteria to invade. R kyptwflm 103th 2. How do some viruses void the humoral immune response? A. They cause formation of syncytia to have more room to replicate inside cells. B. They polymerize host cytoskeletal proteins to propel them into adjacent cells. " 5L el‘QfiZ. C. They coat themselves with host proteins so that they resemble “self” cells. - 5:.on #- pnoéo3 u. D. They produce an inhibitor of MHC-I that interferes with Tc cell function. —. +4.1- “,Ju M44,“ E. They have no need to do this, since humoral immunity does not affect Viruses. u N A “My!“ K it km d»; —. “4.1...an Mu,” humanI. ‘9" WM mm ' 3. If the incidence of a disease in a certain population is reported to be much higher than its prevalence, which of the following must be true? A. It is a very acute disease, from which patients recover quickly. B. It is a chronic or latent disease that continues reappearing for many years. C. It is spread by direct contact. 4; 1 '1th W cg .1) W + cm W D. It must be endemic in the population. A/ 1/ cm —- E. A mistake has been made. Incidence is never higher than prevalence. L '7} I? ‘4“ h” I He H mm... was)...” 4. In nursing, Standard Precautions are taken to prevent transmitting disease Via the nurséaln addition, there are Supplemental Precautions based on . . . ahborm I dra‘ahb) Winn/é 7ftmw; A. the age of the patient (infant, elderly, etc.) K B. the mode of transmission of the disease with which the patient is infected C. the part of the patient’s body with which the nurse must come in contact D. the prevalence of the disease in a particular hospital E. how frequently the nurse must come in contact with the patient 5. Which of the following would characterize a good antimicrobial agent? ,Ia‘i‘fW‘va-MJ‘V W A. being from the first generation of its type B. must be administered intravenously —- m if ‘4' u.» 4-. Orb—e, 1‘" ‘ , C. site of action is cell membranes - rm dfifln M bmdfl‘t‘afi- *v w W M [944.) D. high therapeutic index W hull,“ E. resistance genes on R-plasmids rather than bacterial chromosomes “ubw MEMMLL, ...
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