Microbiology Chapter 25 – Flashcards

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Neutrophils are the most abundant phagocytic cells. How do they differ from other phagocytic cells?
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They are common in pus and at the site of acute inflammation
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The most common circulating antibody is 
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IgG
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What causes antibodies to be released into the bloodstream?
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When an antigen binds to the receptor of a B cell, it triggers the B cell to divide to produce plasma cells and memory B cells. The plasma cells release antibodies, which resemble the B cell receptor without the transmembrane portion and the portion that extends into the cytoplasm. This allows the antibodies to be released into the blood stream.
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How do T-cytotoxic cells function in our immune system?
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T cell receptors cause an adaptive immune response by
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only binding when antigens are attached to self proteins
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Substances that cause an immune system response are called 
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immunogens
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What is phagocytosis?
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endocytosis of large particles
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Which of these immune system cells are phagocytes?
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neutrophils
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What does the plasma membrane of a phagocyte attach to on a microorganism?
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Glycoproteins
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The process by which a phagocyte moves toward a chemical signal at the site of an infection is called
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chemotaxis.
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Which of the following phagocytic processes occurs last in the sequence?
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Exocytosis
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What is the role of opsonins?
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They create "handles" that make it easier for the pseudopods of phagocytes to attach to the microbe invader.
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What is a phagolysosome?
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Which of the following is similar to lymph?
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blood plasma without red blood cells
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Which of the following is not a function of the lymphatic system?
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Digestion of carbohydrates
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Which of the following is an example of a barrier defense that forms part of the innate immunity of vertebrates?
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Acidity in the stomach kills many microbes.
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