Human Biology (MindTap Course List)
11th Edition
ISBN: 9781305112100
Author: Cecie Starr, Beverly McMillan
Publisher: Cengage Learning
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Textbook Question
Chapter 9, Problem 2SQ
Complement proteins function in defense by _______.
- a. neutralizing toxins
- b. enhancing resident bacteria
- c. promoting inflammation
- d. forming pores that cause pathogens to disintegrate
- e. both a and b
- f. both c and d
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Deficiencies in complement components C1–C4 are associated with _____.
a. neutropenia
b. chronic granulomatous disease
c. immune-complex disease
d. opportunistic infections
e. leukocytosis.
All of the following are true of some or all complement proteins except _____.
a. they are soluble and bind to pathogen surfaces
b. they participate only in innate immunity
c. they are present in extracellular fluids, blood, and lymph
d. they facilitate the phagocytosis of pathogens
e. they are made as zymogens.
The primary role of complement control proteins that operate in the early stages of complement activation is to _____.
a. regulate the expression of complement proteins
b. ensure that the components of the membrane-attack complex assemble in the correct sequence
c. facilitate the secretion of complement proteins to extracellular locations
d. stabilize complement proteins, thus extending their half-lives in serum
e. ensure that C3b is deposited on appropriate surfaces.
Chapter 9 Solutions
Human Biology (MindTap Course List)
Ch. 9 - Prob. 1RQCh. 9 - Distinguish between a. neutrophil and macrophage...Ch. 9 - What is the difference between innate immunity and...Ch. 9 - What is the difference between an allergy and an...Ch. 9 - ______ are barriers to pathogens at body surfaces....Ch. 9 - Complement proteins function in defense by...Ch. 9 - Prob. 3SQCh. 9 - Prob. 4SQCh. 9 - Antibody-mediated responses work best against...Ch. 9 - Cell-mediated responses work best against...
Ch. 9 - The most common antigens are __________. a....Ch. 9 - The ability to develop a secondary immune response...Ch. 9 - Tears are part of the bodys defensive arsenal....Ch. 9 - Match the immunity concepts: __________...Ch. 9 - New research suggests a link between some microbes...Ch. 9 - Given what you now know about how foreign invaders...Ch. 9 - Researchers have been trying to develop a way to...Ch. 9 - Prob. 4CTCh. 9 - Prob. 5CT
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- A(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_forwardEnhanced phagocytosis of a cell by the binding of aspecific protein is called ________.a. endocytosisb. opsonizationc. anaphylaxisd. complement activationarrow_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_forward
- Match 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_forwardWhich of the following does not describe the outcome of complement activation? a. chemotaxis b. opsonization c. vasoconstriction d. proteolysis e. membrane permeabilization.arrow_forwardWhich of the following is the end product of the complement system?a. properdin b. cascade reaction c. membrane attack complex d. complement factor C9arrow_forward
- Which pathway(s) of complement initiation/activation would you expect to occur earlier in response to a pathogen following immunization against that pathogen? Indicate any/all correct answers. A. alternative pathway B. mannose binding lectin C. classical D. none of the abovearrow_forwardComplement can enhance phadocytosis because of the presence on macrophages and neutrophils of receptors for: а. Factor D b. C3b c. C6 d. C9arrow_forwardWhich of the following is not a consequence of activation of the complement system? Select one: a. Lysis of bacteria and other foreign cells b. Repair of damaged tissue c. Increased phagocytosis by phagocytic cells (opsonization) d. Attraction and activation of leukocytesarrow_forward
- Which of the following participates in an immediate rather than an induced innate immune response to infection in a human host? (Select all that apply.) a. scavenger receptors b. commensal microorganisms c. dectin-1 d. alternative pathway of complement activation e. MyD88 f. CXCL8 g. defensins h. NOD1 and NOD2 i. lectin pathway of complement activation.arrow_forwardComplement must be inactivated because if it were NOT, A. protein synthesis would be inhibited, thus halting important cell processes. В. necessary interferons would not be produced. C. viruses could continue to multiply inside host cells using the host's own metabolic machinery. D. it could make holes in the body's own cells.arrow_forwardbody: a. Active Artificial Acquired Immunity b. Passive Natural Acquired Immunity 17. ype of Immunity that is acquired in response to the entry of a live pathogen into the c. Passive Artificial Acquired Immunity d. Active Natural Acquired Immunity Lifelong immunity to chickenpox is acquired through a. Active Artificial Acquired Immunity b. Passive Natural Acquired Immunity 18. Antibodies injection is an example of a. Active Artificial Acquired Immunity b. Passive Natural Acquired Immunity c. Passive Artificial Acquired Immunity d. Active Natural Acquired Immunity 19. On the other hand, vaccines to stimulate immunity is an example of: Active Artificial Acquired Immunity c. Passive Artificial Acquired Immunity b. Passive Naturai Acquired Immunity d. Active ÎNatural Acquired immunity a. C. Passive Artificial Acquired Immunity d. Active Natural Acquired Immunity Jomel was bitten by a stray dog. She was injected by antibodies and antirabies vaccine.arrow_forward
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