Immunology Quiz #11: Immunoglobulins

1. A 2-year-old boy is brought to the pediatrician because his parents are concerned about his repeated ear infections. Laboratory tests reveal a deficiency in a specific class of immunoglobulins that is particularly effective in mucosal immunity. Which of the following immunoglobulins is most likely deficient in this patient? 

Question 1 of 5

2. A laboratory test is performed on a patient's serum to assess antibody response to a recent infection. The test identifies a type of immunoglobulin that is the first to rise during an acute immune response. Which of the following immunoglobulins is characterized by this early response? 

Question 2 of 5

3. During an immunology lecture, a professor discusses the role of a specific immunoglobulin in allergic reactions and parasitic infections. This immunoglobulin is known to bind to mast cells and basophils, leading to histamine release. Which of the following immunoglobulins is the professor most likely describing? 

Question 3 of 5

4. A 6-month-old infant is brought to the clinic for a routine check-up. The mother is concerned about the baby's immune system and asks about the transfer of immunity from mother to child. The physician explains that a specific class of immunoglobulin can cross the placenta, providing the newborn with passive immunity. Which of the following immunoglobulins is capable of crossing the placenta? 

Question 4 of 5

5. A patient with a known history of chronic infections undergoes immunoglobulin level testing. The test results show elevated levels of a specific immunoglobulin known for its high affinity for microbial polysaccharides and its ability to activate the complement cascade. Which of the following immunoglobulins is most likely elevated in this patient? 

Question 5 of 5


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