Which of the following explains why IgM activates complement so effectively?
A) IgM is the principal isotype in the blood
B) Pentameric IgM has five constant regions available to interact with C1
C) IgM is made in the innate immune response and does not require previous exposure to antigen
D) IgM is transported across mucosal epithelium, where antigens are often first encountered by the host
E) IgM binds with high affinity to mast cells in the connective tissue and is strategically located beneath skin and mucosal surfaces
Correct Answer:
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Q1: Which of the following is incorrectly matched?
A)Helper
Q2: How many antigen-binding sites do T cell
Q3: The B cell antigen receptor is called
Q4: A(n)_ is any foreign substance that provokes
Q5: Which of the following statements is false?
A)Gene
Q7: The concentration of antibody in the serum
Q8: The isotype of an antibody is determined
Q9: Long-lived lymphocytes that respond more rapidly and
Q10: When antigen binds to _ on the
Q11: Which of the following is not a
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