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Intro to Genetics Final Part 3

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Intro to Genetics Final Part 3 The best animal models for xenotransplantation of organs into humans are the nonhuman primates, such as chimpanzees and baboons. ️False Most of the organisms that normally inhabit our skin help defend us against infection. ️True Redness, swelling, heat, an...

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  • August 29, 2024
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Intro to Genetics Final Part 3
The best animal models for xenotransplantation of organs into humans are the nonhuman primates,
such as chimpanzees and baboons. ✔️False



Most of the organisms that normally inhabit our skin help defend us against infection. ✔️True



Redness, swelling, heat, and pain of an infection are a result of the adaptive immune response. ✔️False



The membrane-attack complex is a group of proteins that supplements the inflammatory response.
✔️False



The huge diversity of antibody molecules is generated by the shuffling of gene segments in T cells.
✔️False



Activated B cells divide to form plasma cells and memory B cells, both of which are short-lived and
secrete copious amounts of antibody molecules into the bloodstream. ✔️False



B cells are genetically programmed to produce unique antibodies; similarly, T cells are genetically
programmed to produce unique T-cell receptors. ✔️True



A person with blood group A has both A and B type antibodies. ✔️False



Because there are so many HLA allele combinations, it is rare to find unrelated individuals with the same
HLA halplotypes. ✔️True



Juvenile diabetes (or insulin-dependent diabetes) results when insulin-producing cells in the pancreas
are destroyed by the patient's own immune system. ✔️True



The technology of transplanting nonhuman organs into humans is known as _____.
✔️xenotransplantation

, The major obstacle to the use of xenotransplants is _____. ✔️organ rejection by recipients



The major obstacle to the use of xenotransplants can possibly be overcome by ____. ✔️changing
genetic markers in humans to make them more receptive to nonhuman tissue



The physical barrier of the skin and the mucus produced by the epithelial cells lining body cavities ____.
✔️protect the body from infection by pathogens



The most effective level of defense against pathogens is the ____ immune system, because it ____. ✔️
adaptive; recognizes specific pathogens



In an inflammatory response, the direct effect of histamine is to ____. ✔️dilate blood vessels causing
increased blood flow to the area of infection



What is the underlying molecular cause of Crohn's disease? ✔️Receptor proteins are mutated and
cause an abnormal immune response.



As part of the inflammatory response, _____ engulf and destroy invading bacteria. ✔️macrophages



What is most closely associated with membrane-attack complexes (MACs)? ✔️complement proteins



The complement system functions to ____ and ____. ✔️destroy invading cells; guide phagocytes to the
infection site



The quick response of the immune system to a second infection is due to the _____, a feature of the
immune system as demonstrated by the success of vaccines. ✔️T and B memory cells



B and T cells become activated and divide to produce identical cells when _____. ✔️activated by an
antigen

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