Challenge 4 unit 4.challenge four unit four human biology Sophia pathway from sophia.org

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1. Which of the following is a function of the lymphatic system? a.) Returning excess fluid to the circulatory system. Correct answer b.) Pumping blood through the body c.) Sending signals from the brain to the extremities d.) Circulating nutrients to various organs 2. Which of the following statements about innate immunity is true? a.) Innate immunity describes how physical barriers prevent many pathogens from entering the body b.) Innate immunity is a generalized response that does not target specific pathogens. Correct answer c.) Innate immunity involves a targeted response against pathogens the body has fought before d.) Innate immunity means a type of pathogen doesn't have any effect on the human body 3. A fever is an example of what kind of defense against pathogens? a.) Innate immunity. Correct answer b.) Adaptive immunity c.) All answer choices are correct d.)
Physical barriers 4. Which of the following is a characteristic of adaptive immunity? a.) It can only work on specific types of pathogens. Correct answer b.) Adaptive immunity takes place before the pathogen has entered the body. c.) Because it attacks all cells, it can sometimes damage the body's own healthy cells. d.) Adaptive immunity is the first line of defense against a pathogen. 5. Which set of facts is true for humoral immunity? a.) It is an adaptive response. it is mediated by T-cells in the thymus. b.) It is an adaptive response. It is mediated by B-cells in lymph nodes. Correct answer c.) It is an innate response. It is mediated by B-cells in lymph nodes. d.) It is a non-specific response. It is mediated by macrophages. 6. What is apoptosis? a.) The intentional death of a cell. Correct answer b.) Death of a cell after dividing c.) Death of a cell from old age
d.) The accidental death of a cell 7. Which cells would be activated in response to the drug Herceptin being added to a cell containing HER2 protein? a.) Spleen cells b.) Memory cells c.) Myeloma cells d.) Natural killer cells correct answer 8. Which of the following statements about vaccines is true? a.) Vaccines use dead or weakened antigens to produce antibodies, known as active immunity. Correct answer b.) A vaccine marks invading viruses the body wouldn't otherwise notice for destruction. c.) A booster shot is used to elicit a primary immune response in which the body produces antibodies against a particular pathogen. d.) Vaccines prevent the production of memory cells, making it difficult for disease to spread. 9. Rheumatoid arthritis is an example of what type of disorder? a.) Autoimmune disorder. Correct answer b.) Could be any c.)
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Immunodeficiency d.) Allergy 10. Which of the following is most active in fighting cancer cells? a.) T-cells and B-cells in humoral immune responses b.) Phagocytes and lymphocytes in innate immune responses c.) Cytotoxic T-cells and NK-cells in cell-mediated immune responses correct answer d.) Dendritic cells and B-cells in antibody mediated immune responses

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