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Explain the two main features that characterize the third line of host defense mechanisms. |
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- Describe several features of the recognition system of host defenses.Describe the ways in which each of the following pathogens can disarm their host’s immune system or manipulate it to their own advantage:a. Pathogenic strains of Staphylococcusb. Enveloped virusesExplain seven innate (nonspecific) defense mechanisms.
- Explain the mechanism underlying the molecular structure of C7, C8, and C9 complement protein that facilitates their insertion into the cell membrane of a pathogen?Decreasing the amount of cytokine produced by the body would most directly prevent what event during the progression of COVID-19 in its host? A). Early viral infection of host cells. B). Replication of infected cells. C). Excessive damage to lung cells by the hot immune system. D). Transmission of the virus from one host to another.Describe some factors that weaken host defenses and increase susceptibility to infection.
- An adaptive immune response underlying coeliac disease pathogenesis involves: a) Production of Th1 (T helper cell 1 type) cytokines that act to promote the production of antibodies to gluten peptides b) Production of anti-gliadin and anti-tissue transglutaminase antibodies via TH2 cytokines c) Conversion of glutamate to glutamine by deamination d) The early recognition of gluten peptides via pattern recognition receptors on epithelial cells and the subsequent release of Interleukin 15docs.google.com/forms/d/e/1FAlpQLSen_DnlxjlAa6EoAyAOhS Gitcmj9fQ_M4bwAg1Wizsq5Yp4A/formResponse O YouTube Maps nanswers TaT4 are rUC Which of the following are true regarding testosterone? * (1) Testosterone acts on specific target cells to stimulate male sexual characteristics. (2) Testosterone is directly stimulated by the release of GnRH. (3) Testosterone produces a negative feedback mechanism to regulate GnRH. (4) If spermatogenesis is slow, testosterone production is stimulated. O A- If answers (1), (2) and (3) are TRUE B- If answers (1) and (3) are TRUE O C- If answers (2) and (4) are TRUE O D- If only answer (4) is TRUE O E- If answers (1), (2), (3) and (4) are TRUE Which is true of the following statements regarding COVID-19? (1) SARS-CoV-2 is the virus that causes COVID-19 (2) The new coronavirus can infect the upper or lower part respiratorv svstemExplain the multifaceted role of interferons as first responders to viral infection: Identify important target ISGs. Discuss the general mechanisms by which interferon induced genes block virus replication.
- Select all of the following that are functions performed by different antibodies. a) Group of answer choices b) Attracting natural killer cells to destroy an infected cell. c) Blocking the ability of a pathogen to bind to a host cell d) Lysing a pathogen cell wall or lipid bilayer. e) Marking a pathogen so that innate immune cells destroy the pathogen. f) Helping complement proteins bind to a pathogen.Removal of apoptotic cells are done by: Question 6 options: a) phagocytes or neighboring cells. b) circulatory system sweeping away the fragmented cells. c) fragmentation of the cell into small enough pieces that they are swept away by extracellular fluid. d) fusion of the apoptotic cell to neighboring cells to form multinucleate cells. e) migration of the apoptotic cells from the tissue to the lymphatic system to be flushed out.Select all of the following that are functions performed by different antibodies. ( select all the correct answers) Group of answer choices a) Attracting natural killer cells to destroy an infected cell. b) Blocking the ability of a pathogen to bind to a host cell c) Lysing a pathogen cell wall or lipid bilayer. d) Marking a pathogen so that innate immune cells destroy the pathogen. e) Helping complement proteins bind to a pathogen.