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. |