Which of the following best describes IgM antibodies?
A) They cause basophils and eosinophils to degranulate.
B) They are the most common type of antibody in the blood during the initial phases of an immune response.
C) They interact with phagocytes and NK cells.
D) They can cross the placenta to provide passive immunity.
E) They are the antibody class found in body secretions.

Question

Quizplus · Accepted Answer

IgM antibodies are the first antibodies to be produced during the initial phases of an immune response, making them the most common type in the blood at that time.

Which of the Following Best Describes IgM Antibodies