Textbook Question
Which of the following would be recommended as a means to diagnose a type I sensitivity? Select all that apply. (NCLEX/HESI/TEAS)
a. Skin prick test
b. IgG titers
c. IgM titers
d. IgE titers
e. Histamine levels
551
views
20. Adaptive Immunity
Antibodies
Struggling with Microbiology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
How many chemically distinct classes of human immunoglobulins are there?
A
Four
B
Three
C
Six
D
Five
Verified step by step guidance1
Understand that human immunoglobulins (antibodies) are classified based on the structure of their heavy chains, which determine their class or isotype.
Recall that the main classes of human immunoglobulins are IgG, IgA, IgM, IgE, and IgD, each with distinct heavy chain types (gamma, alpha, mu, epsilon, and delta respectively).
Recognize that these five classes differ in their biological functions, distribution in the body, and ability to activate immune responses.
Note that the question asks for chemically distinct classes, which corresponds to these five heavy chain types, not subclasses or variants within a class.
Conclude that the number of chemically distinct classes of human immunoglobulins is five, based on the five different heavy chain types.
Related Videos
Related Practice
