EBK MICROBIOLOGY
12th Edition
ISBN: 8220100659720
Author: CASE
Publisher: PEARSON
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Chapter 16, Problem 1MCQ
Summary Introduction
Introduction:
The complement system consists of thirty heat-labile proteins from plasma and is involved in the opsonization of pathogens for assisting the immune responses of the host. The complement proteins are protease in nature, which helps to cleave the antigens to neutralize the infectious substances. It is a cascade or a series of proteins (from C1 to C9 and some proteins are indicated as lower cases, a and b) that commence at the time of infection; the process is termed as complement activation.
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Which of the following is not among the first line of defenses against infection? *
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Which of the following is NOT true regarding the alternative complement pathway?
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а.
b.
It does not require C1, C2 or C4.
с.
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d.
It has the terminal sequence of events as the lectin pathway.
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Chapter 16 Solutions
EBK MICROBIOLOGY
Ch. 16 - Identify at least one physical and one chemical...Ch. 16 - Define inflammation, and list its characteristics.Ch. 16 - What are interferons? Discuss their roles in...Ch. 16 - How can the complement system cause endotoxic...Ch. 16 - Patients with X-linked chronic granulomatous...Ch. 16 - Prob. 6RCh. 16 - Give several examples of how microbes evade the...Ch. 16 - Prob. 8RCh. 16 - Are the following involved in innate or adaptive...Ch. 16 - These agranulocytes are not phagocytic until they...
Ch. 16 - Prob. 1MCQCh. 16 - Prob. 2MCQCh. 16 - If the following are placed in the order of...Ch. 16 - Prob. 4MCQCh. 16 - A human host can prevent a pathogen from getting...Ch. 16 - Prob. 6MCQCh. 16 - In 1884. Elie Metchnikoff observed blood cells...Ch. 16 - Prob. 8MCQCh. 16 - Prob. 9MCQCh. 16 - Prob. 10MCQCh. 16 - Prob. 1ACh. 16 - Prob. 2ACh. 16 - Prob. 3ACh. 16 - The list below identifies a virulence factor for a...Ch. 16 - People with Rhinovirus infections of the nose and...Ch. 16 - Prob. 2CAECh. 16 - Leukocyte adherence deficiency (LAD) is an...Ch. 16 - The neutrophils of individuals with Chdiak-Higashi...Ch. 16 - Consider the following. a. In laboratory...
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- are cytolytic proteins that binds to target cell's plasma membrane to form pores. a. Chemokines b. Perforins c. Cytotoxicity d. Interferonsarrow_forwardWhich of the following does not accurately describe complement components? A. made by the spleen B. located in extracellular spaces C. some function as proteases once activated D. activated by a cascade of enzymatic reactions. E. soluble proteinsarrow_forwardAcidic environments slow the growth of or destroy some pathogens. Which locations in the body use this defence mechanism? Select ALL that apply. a. Skin (sweat) b. Mouth (saliva) O c. Stomach (hydrochloric acid) O d. Vagina (produced by beneficial bacteria) e. Urinary tract (urine)arrow_forward
- Which of these statements about complement proteins C3a and C5a is false?a. They are released during the complement fixation process.b. They stimulate chemotaxis of phagocytic cells.c. They promote the activity of phagocytic cells.d.They produce pores in the victim plasma membrane.arrow_forwardA child falls and receives a deep cut on her leg that went through her skin and is bleeding. Which of the following defense mechanisms will participate in eliminating contaminating microbes? A. ciliary escalator B. normal skin flora C. phagocytosis in the inflammatory response D. Iysozymearrow_forwardMatch the barrier defense organ with its defense mechanisms A. vagina B. trachea and bronchi C. skin D. stomach E. mouth select A B C D E 1. villi pushing material outward select A B C D E 2. igA dimers in the saliva select A B C D E 3. low pH, antibodies, and secretions select A B C D E 4. keratinized epithelium and sweat glands select A B C D E 5. extremely low pH and digestive enzymesarrow_forward
- Which pathway of complement activation acts in conjunction with the action of antibodies? A. the lectin pathway В. the alternative pathway C. the classical pathway D. the attack pathwayarrow_forwardImmunoglobins help eliminate the pathogen through the process of: A. Release of hydrolytic enzymes on the pathogen B. Agglutination and precipitation C. Direct phagocytosis D. Activating plateletsarrow_forwardAcidic environments slow the growth of or destroy some pathogens. Which locations in the body use this defence mechanism? Select ALL that apply. □ a. Vagina (produced by beneficial bacteria) b. Skin (sweat) O c. Lungs (mucus) Od. Stomach (hydrochloric acid) De. Mouth (saliva) f. Urinary tract (urine)arrow_forward
- Which of the following is not typically considered a defense against infection within the Gl tract? a. keratinized layer of cells C. secretory IgA b. mucous coat d. continuous passage of cellsarrow_forwardEnhanced phagocytosis of a cell by the binding of aspecific protein is called ________.a. endocytosisb. opsonizationc. anaphylaxisd. complement activationarrow_forwardA(n) _____ is an inactive form of an enzyme that frequently participates in a cascade of enzymatic reactions during complement activation. a. regulator of complement activation b. convertase c. complement control protein module d. zymogen e. opsonin.arrow_forward
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