The gastrointestinal microbiota has been implicated in the development of
A. appropriate immune responses to microbial antigens.
B. dental plaque.
C. non-infectious diseases like obesity.
D. All of the responses are correct.
Answer: D
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The large surface area in the gut directly facilitates _____
A) secretion B) absorption C) elimination D) filtration E) temperature regulation
Recent research has shown that myostatin can negatively regulate cardiac muscle growth
Indicate whether the statement is true or false.
Answer the following statements true (T) or false (F)
1.A transfusion can provide passive immunity. 2.If an Rh- woman has two babies who are Rh+, her immune response to the second baby would be an example of a secondary immune response. 3.T cells direct humoral immunity while B cells govern cell-mediated immune reactions. 4.Lymph nodes have a crucial role in immunity. 5.Adaptive immune defenses provide a rapid, broad defense against any infectious agent.
Which of the following is a testable hypothesis?
A) Taking zinc lozenges at the first sign of cold symptoms is wise. B) Avoiding contact with other people reduces the chance of catching a cold. C) Being a good driver makes you less likely to catch a cold. D) Sleeping 8 hours a night makes you feel better when you have a cold.