TEST BANK Understanding Pathophysiology 7th edition by Huether, McCance | Chapter 1 – 44 | Complete Guide
TEST BANK Understanding Pathophysiology 7th edition by Huether, McCance | Chapter 1 – 44 | Complete Guide Which of the following is responsible for initiating clonal selection? a. T cells b. B cells c. Antigens d. Lymphocytes ANS: C The lymphocytes remain dormant until an antigen initiates clonal selection. T cells are part of the immune response, but do not initiate clonal selection. B cells are antibodies. Lymphocytes are released into the circulation as immature cells that react with antigens. Cognitive Level: Comprehension 144 2. After teaching the students about B cells, which statement indicates teaching was successful? B cells are originally derived from cells of the: a. Bone marrow b. Lymph nodes c. Gut-associated lymphoid tissue d. Thymus Opsonin coat the surface of bacteria and increase their susceptibility to being phagocytized. Opsonin's are not composed of fatty acids; they are antibodies. Opsonin coat the surface of bacteria and increase their susceptibility to being phagocytized. They do not regulate inflammation; mast cells do. Opsonin's coat the surface of bacteria and increase their susceptibility to being phagocytized; they do not react with mast cells. Prostaglandins cause increased vascular permeability, neutrophil chemotaxis, and pain by direct effects on nerves. Kinins also promote pain. Prostaglandins produce pain; histamine promotes vasodilation. Prostaglandins produce pain, not vasoconstriction. Prostaglandins produce pain, not the immune complex Epithelial cells secrete several substances that protect against infection, including earwax. Hormones do not contain biochemical secretions that trap and kill microorganisms. Neurotransmitters carry important messages, but they do not contain biochemical secretions. Gastric acid helps break down food into its component parts, but does not contain biochemical secretions. Epithelial cells secrete several substances that protect against infection, including earwax. Hormones do not contain biochemical secretions that trap and kill microorganisms. Neurotransmitters carry important messages, but they do not contain biochemical secretions. Gastric acid helps break down food into its component parts, but does not contain biochemical secretions. Epithelial cells secrete several substances that protect against infection, including earwax. Hormones do not contain biochemical secretions that trap and kill microorganisms. Neurotransmitters carry important messages, but they do not contain biochemical secretions. Gastric acid helps break down food into its component parts, but does not contain biochemical secretions.
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