Question: Answer the following question given this paragraph: Hypersensitivities Maladaptive immune responses toward harmless foreign substances or self antigens that occur after tissue sensitization are termed hypersensitivities. The types of hypersensitivities include immediate, delayed, and autoimmunity. A large proportion of the population is affected by one or more types of hypersensitivity. Allergies The immune reaction that results from immediate hypersensitivities in which an antibody-mediated immune response occurs within minutes of exposure to a harmless antigen is called an allergy. In the United States, 20 percent of the population exhibits symptoms of allergy or asthma, whereas 55 percent test positive against one or more allergens. Upon initial exposure to a potential allergen, an allergic individual synthesizes antibodies of the IgE class via the typical process of APCs presenting processed antigen to TH cells that stimulate B cells to produce IgE. This class of antibodies also mediates the immune response to parasitic worms. The constant domain of the IgE molecules interact with mast cells embedded in connective tissues. This process primes, or sensitizes, the tissue. Upon subsequent exposure to the same allergen, IgE molecules on mast cells bind the antigen via their variable domains and stimulate the mast cell to release the modified amino acids histamine and serotonin; these chemical mediators then recruit eosinophils which mediate allergic responses. Figure 42.26 shows an example of an allergic response to ragweed pollen. The effects of an allergic reaction range from mild. Q: Hypersensitivity may refer to a maladaptive response of what system toward a harmless foreign substance? Choices: - oxygen - brain - System - immune A:
Answer: immune

Question: Answer the following question given this paragraph: A sexually transmitted infection (STI) is a disease that spreads mainly through sexual contact. STIs are more common in teens and young adults than in older people. Bacterial STIs include chlamydia, gonorrhea, and syphilis. Viral STIs include genital warts, genital herpes, and AIDS. Q: What are chlamydia, gonorrhea, and syphilis an example of? Choices: - metabolic disorders - genetic diseases - viral stis - bacterial stis A:
Answer: bacterial stis

Question: Answer the following question given this paragraph: Q: The community of all of the living and nonliving parts of an environment is known as what? Choices: - habitat - population - biodiversity - ecosystem A:
Answer:
ecosystem