Mc Graw Hill 35 of 138 Concepts completed Multiple Choice Question Babies are born with an immune system that _________ O has no ability to fight pathogens; that comes several months after birth O contains antibodies against all pathogens O can distinguish "self" from "foreign" antigens Need help? Review these concept resources.
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True/False (2 pt), Definitions and Multiple Choice (2 pts) choose the best answer. 1. Reovirus has a dsRNA genome and was isolated by Jonas Salk. 2. interferon alpha/beta inhibits viral replication but neutrophils and Th cells are needed to clear the infection. 3. Chemists are trying to formulate better formula by adding antibodies. 4. exogenous pyrogens, like LPS, induce fever. 5. Whooping cough is caused by a gram positive coccus, Burnetella pertussis. 6. T cells originate in the bone marrow and mature in the thyroid. 7. LTB4 is an an abbreviation for a type of lung tuberculosis 8. The spleen is a primary lymphoid organ. 9. The best defense against infectious disease is a good offense (vaccines). 10. The lymphatic system is an open system of vessels. 11. The primary virulence factor in tetanus is endotoxin. 12. The adaptive immune response always involves T and/or B cells 13. The mannose receptor on macrophages binds to a carbohydrate. 14. Toll-like receptors are used to detect foreign pathogens and are only found in invertebrates. 15. A key difference between pathogenic and nonpathogenic m.o.'s is their ability to overcome innate immune defenses. 16. f-metleuphe is a common prokaryotic peptide sequence found throughout a bacterial protein sequence. 17. Rosalind Yalow received the Nobel Prize for developing a radioactive immunoassay.
Adi S.
Developmental Aspects of Body Defenses 24. Complete the following statements concerning the development and operation of the immune system during the life span by inserting your answers in the answer blanks. 1. Antibodies 2. Macrophage 3. Thymus 4. Thymosin 5. Antigens 6. 7. 8. 9. 10. 11. 12. The earliest lymphocyte stem cells that can be identified appear during the first month of development in the fetal (1). Shortly thereafter, bone marrow becomes the lymphocyte origin site; but after birth, lymphocyte proliferation occurs in the (2). The (3) is the first lymphoid organ to appear, and the development of the other lymphoid organs is believed to be controlled by the thymic hormone (4). The development of immunocompetence has usually been accomplished by (5). Individuals under severe stress exhibit a (6) immune response, an indication that the (7) system plays a role in immunity. During old age, the effectiveness of the immune system (8); and elders are more at risk for (9), (10), and (11). Part of the declining defenses may reflect the fact that (12) antibodies are unable to get to the mucosal surfaces where they carry out their normal protective role.
Madhur L.
Because the immune system is still developing, a newborn baby has not yet been exposed to pathogens in the environment. Given the overall high prevalence of pathogens in the environment, explain why more newborns do not die from these disease-causing agents. A. The pathogens stimulate a secondary immune response B. T and B cells were relieved across the placenta during gestation C. Antibodies are received from their mothers’ milk D. Babies are born with numerous developed, long-lasting antibodies, B cells, and T cells
Luke H.
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