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PRESCOTT'S MICROBIOLOGY (MCGRAW HILL) QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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PRESCOTT'S MICROBIOLOGY (MCGRAW HILL) QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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PRESCOTT'S MICROBIOLOGY(MCGRAW HILL) QUESTIONS AND
ANSWERS WITH SOLUTIONS 2024
A person unable to make lysozymes in their tears would be more susceptible to infection by
____________. - ANSWER Gram positive bacteria
T or F: A complex C3bBb is the C3 convertase in the alternative pathway. - ANSWER True
Complement is part of a group of "second line" host defenses that are nonspecific or mail'y nonspecific.
Which of this is not part of the group? - ANSWER Plasma
Complement is a group of _________ found in the bloodstream. - ANSWER Protein
The complement components react _______________. - ANSWER In a cascade
Complement proteins are found in - ANSWER Serum
The classical complement pathway is activated when: - ANSWER C1 binds to the antibody in an antigen-
antibody complex.
C3 convertase cleaves C3 into: - ANSWER C3a and C3b
C3b: - ANSWER binds to both the surface of microorganisms and receptors on the surface of phagocytes
Both the classical and alternative complement pathways create: - ANSWER C3 convertase
The membrane attack complex kills cells by - ANSWER creating holes in plasma cell membranes
The three primary finctions of the complement activation are: - ANSWER -enhancing phagocytosis
, -causing inflammation
-killing target cells
Phagocytes are attracted by all except: - ANSWER lysosomes
In phagocytosis the digested components are eliminated by: - ANSWER Exocytosis
A Lysome: - ANSWER contains lysozyme and proteases that digest bacteria
T or F: Complement factor C3b coats a bacterium and binds to C3b receptors on phagocytes, making the
bacterium more susceptible to being phagocytized. - ANSWER True
T or F: A phagosome containing the engulfed bacteria combines with a lysosome containing enzyme to
produce a phagolysosome - ANSWER True
Innate (nonspecific) chemical defenses of the human host include all of the following except - ANSWER
Antibodies
2nd line of defense: - ANSWER phagocytosis
T or F: Some hosts are genetically immune to the diseases of the host: - ANSWER True
3rd line of defense: - ANSWER B-cells
Neutrophil - ANSWER principal phagocytic responder in blood
Eosinophil - ANSWER important in defense against protazoan and helminth parasites
Dendritic cell - ANSWER present antigens to lymphocytes
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