Immunology PCB 4233 Exam 1 Questions With Correct Answers

Immunology PCB 4233 Exam 1 Questions
With Correct Answers

1. C3b :
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a. is chemotactic
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b. is an anaphylatoxin
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c. opsonizes bacteria
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d. directly injures bacteria
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e. is the inactive form of C3 - CORRECT ANSWER✔✔-c. opsonizes bacteria
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A term generally used to describe all white blood cells is:
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a. Mast cell
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b. myeloid progenitor
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c. dendritic cell
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d. leukocyte
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e. polymorphonuclear (PMN) - CORRECT ANSWER✔✔-d. leukocyte
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What is the name given to the earliest intracellular vesicle that contains material
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opsonized by macrophages? | |

,a. Opsonome
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b. Membrane-attack complex
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c. Phagosome
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d. Lysosome
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e. Specific granules - CORRECT ANSWER✔✔-c. Phagosome
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The early events of inflammation are characterized by all of the following except
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_____________:


a. Vasodilation
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b. Extravasation
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c. Pain
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d. Apoptosis
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e. Chemotaxis - CORRECT ANSWER✔✔-d. Apoptosis
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All of the following are involved in the alternative pathway of complement
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activation except ________ | |




a. C4
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b. Factor B
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c. Factor D
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d. Properdin
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e. C5 - CORRECT ANSWER✔✔-a. C4
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,A(n) _____________ is an inactive form of an enzyme that frequently participate
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in a cascade of enzymatic reactions during complement activation.
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a. Regulator of complement activation
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b. Convertase
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c. Zymogen
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d. Complement control protein module
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e. Opsonin - CORRECT ANSWER✔✔-c. Zymogen
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Which of the following statements regarding TLR4 is false?
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a. The ligand for TLR4 is LPS
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b. TLR4 homo-dimerized upon binding with its ligand
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c. TLR4 has an intracellular TIR domain
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d. TLR4 is an example of a phagocytic receptor
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e. The extracellular domain of TLR4 associate with MD2 - CORRECT ANSWER✔✔-
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d. TLR4 is an example of a phagocytic receptor
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An antimicrobial peptide that protects epithelial surfaces from pathogens is:
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a. Glycoprotein
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b. Defensin
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c. Proteoglycan
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d. Lysozyme
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, e. Sebum - CORRECT ANSWER✔✔-b. Defensin
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Which of the following describes chemokines?
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a. Membrane receptors that detect the presence of cytokines
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b. Soluble proteins that attract specific cells to an area
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c. Transcription factors that induce the expression of genes involved in cell
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adhesion
d. Adhesion molecules that bind to the inside of blood vessels
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e. PAMPs found on microorganisms particularly bacteria - CORRECT ANSWER✔✔-
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b. Soluble proteins that attract specific cells to an area
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Which of the following is the correct relationship? _________ on _________
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recognize _________ on _________.
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a. PRRs : macrophages; PAMPs : neutrophils
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b. PRRs : pathogen; PAMPs : macrophages
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c. PAMPs : macrophages; PRRs : pathogens
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d. PAMPs : neutrophils; PRRs : pathogen
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e. PRRs : Macrophages; PAMPs : Pathogens - CORRECT ANSWER✔✔-e. PRRs :
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Macrophages; PAMPs : Pathogens | | |




Which of the following statement regarding the innate immune response is false:
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