ATI RN
Chapter 20 The Lymphatic System and Immunity Sample Questions Questions
Question 1 of 5
Complete the following sentence. During an immune response, the first antibody isotype expressed is.
Correct Answer: D
Rationale: IgM is the first isotype produced in a primary response, expressed on naïve B cells and secreted early.
Question 2 of 5
Which immunoglobulins are generally present in plasma at the highest concentration?
Correct Answer: D
Rationale: IgG is the most abundant in plasma (~80%); IgA , IgD , and IgE are less concentrated.
Question 3 of 5
B and T cells are produced by stem cells that are formed in:
Correct Answer: A
Rationale: B and T cells originate in bone marrow ; liver is fetal, spleen is secondary.
Question 4 of 5
How many types of antibodies are present?
Correct Answer: B
Rationale: Five antibody classes exist (IgG, IgA, IgM, IgD, IgE) ; not 2, 4, or 6.
Question 5 of 5
Which of the following is called the first line of defense in the immune response?
Correct Answer: A
Rationale: Innate immunity is the first defense; acquired (B, D) follows.