1) In general, the LD50 for exotoxins is much greater than the LD50 for endotoxins.
Answer: FALSE
2) Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents.
Answer: TRUE
3) The M protein enhances the virulence of Streptococcus by preventing phagocytosis.
Answer: TRUE
4) In A-B exotoxins, the A component binds to the host cell receptor so that the B component can enter the cell.
Answer: FALSE
5) The Limulus amoebocyte assay is used to detect minute amounts of endotoxin in drugs and medical devices.
Answer: TRUE
6) Cytopathic effects, such as inclusion bodies and syncytium formation, are the visible signs of viral infections.
Answer: TRUE
7) Ergot and aflatoxin are toxins sometimes found in grains contaminated with fungi.
Answer: TRUE
8) Most symptoms of endotoxins can be treated with administration of anti-endotoxin antibodies.
Answer: FALSE
9) Infections with some viruses may induce chromosomal changes that alter the growth properties of host cells.
Answer: TRUE
10) Many pathogens use the same portal for entry and exit from the body.
Answer: TRUE
Answer: FALSE
2) Biofilms provide pathogens with an adhesion mechanism and aid in resistance to antimicrobial agents.
Answer: TRUE
3) The M protein enhances the virulence of Streptococcus by preventing phagocytosis.
Answer: TRUE
4) In A-B exotoxins, the A component binds to the host cell receptor so that the B component can enter the cell.
Answer: FALSE
5) The Limulus amoebocyte assay is used to detect minute amounts of endotoxin in drugs and medical devices.
Answer: TRUE
6) Cytopathic effects, such as inclusion bodies and syncytium formation, are the visible signs of viral infections.
Answer: TRUE
7) Ergot and aflatoxin are toxins sometimes found in grains contaminated with fungi.
Answer: TRUE
8) Most symptoms of endotoxins can be treated with administration of anti-endotoxin antibodies.
Answer: FALSE
9) Infections with some viruses may induce chromosomal changes that alter the growth properties of host cells.
Answer: TRUE
10) Many pathogens use the same portal for entry and exit from the body.
Answer: TRUE
Learn More :
Microbiology Chapter 15
- Superantigens produce intense immune responses by stimulating lymphocytes to produce ___.
- Which non-specific defense mechanism is mismatched with its associated body structure or body fluid?
- Lysozyme and the antibiotic penicillin have similar mechanisms of action in that they both cause damage to the bacterial
- Which of the following statements about the classical pathway of complement activation is FALSE?
- Several inherited deficiencies in the complement system occur in humans. Which of the following would be the MOST severe?
- All of the following are components of the inflammatory process EXCEPT
- The lectin pathway for complement action is initiated by
- All of the following occur during inflammation. What is the first step?
- All of the following are iron-binding proteins found in humans EXCEPT
- All of the following pertain to fever EXCEPT that it
- Macrophages arise from which of the following?
- Which of the following is involved in resistance to parasitic helminths?
- All of the following are true regarding NK cells EXCEPT
- Activation of C5C9 results in
- After ingesting a pathogen, lysosomal enzymes produce all of the following EXCEPT
- Innate immunity includes all of the following EXCEPT
- Neutrophils with defective lysosomes are unable to
- Activation of C3a results in
- The classical pathway for complement activation is initiated by
- The alternative pathway for complement activation is initiated by
- All of the following are part of the mechanism of action of alpha and beta interferons EXCEPT
- Which of the following is mismatched?
- Which of the following statements is TRUE?
- A chill is a sign that
- All of the following are effects of histamine EXCEPT
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.