ATI RN
Chapter 20 The Lymphatic System and Immunity Sample Questions Questions
Question 1 of 5
The yellow, red and blue components of the immunological synapse formed between a cytotoxic T cell and its target in the figure below correspond respectively to
Correct Answer: A
Rationale: The synapse typically has a secretory domain (yellow, granzyme release), adhesion zone (red, stability), and signaling domain (blue, TCR), per standard models.
Question 2 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 3 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 4 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.
Question 5 of 5
Isotypes refer to variations in the:
Correct Answer: A
Rationale: Isotypes (e.g., IgG, IgM) differ in the heavy chain constant region, determining function, not variable regions (specificity).