Micro Chp.20 Review -True/False
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Created by:
phoenix180 on November 12, 2011
Subjects:
Description:
Questions from the Chapter 20 Review posted by Prof. Torres
Classes:
Microbiology Lecture and Lab Study Group
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18 terms
Terms | Definitions |
|---|---|
 __ was first described by Elie Metchnikoff | Phagocyte |
| __ can move out of the circulation to engulf foreign particles or pathogens | Phagocyte |
| __ results in redness, heat, pain, and swelling | Inflammation |
| __ may develop from mechanical injury such as a blow to the skin | Inflammation |
| __ attack cells when MHC proteins are absent | Natural Killer Cells |
| __ contain granules that contain toxic compounds to defend against multicellular parasites, such as flukes and tapeworms | Eosinophil |
| __ is inhibited by a bacterial capsule | Phagocyte |
| __ involves granzymes and perforins | Natural Killer Cells |
| Innate immunity, consists of several nonspecific defenses present in all humans from the time of birth. True or False? | True |
| The polymorphonuclear neutrophils, monocytes, and macrophages are primarily concerned with phagocytosis. True or False? | True |
| The lymphocyte is a leukocyte with a single nucleus that exists in the lymph nodes and functions in the immune system. True or False? | True |
| Innate immunity develops over the course of the infection, taking several days to more than a week, to mount an effective response and a protective defense. True or false? | False; innate immunity defense system responds within minutes, or a few hours after infection |
| Acquired immunity develops over the course of the infection, taking several days to more than a week, to mount an effective response and a protective defense. True or False? | True |
| A natural barrier to the intestine is provided by the extremely alkaline environment of the stomach contents. True or False? | False; the stomach has an extremely acidic environment-pH of 2.0 |
| A mixture of plasma dead tissue cells, leukocytes, and dead bacteria enclosed in a wall of fibrin yields an abscess or boil. True or false? | True |
| The internalization of a microbe into phagocyte is enhanced when the microbe is coated with certain serum proteins, such as antibodies or complement. These protein molecules, called opsonins, attach to the microbes and increase the ability of phagocytes to adhere to the pathogen. True or False? | True |
| The immune system responds to invasion by pathogenic microbes by mounting a rapid innate response, followed several days later by the development of antibodies and lymphocytes as part of the acquired immune response. True or False? | True |
| Toll-like receptors (TLRs) are signaling receptors on macrophages, dendritic cells, and endothelial cells membrane that accelerate the formation of phagolysosomes and faster killing of engulfed microbes. True or False? | True |
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