ATI RN
Chapter 20 The Lymphatic System and Immunity Sample Questions Questions
Question 1 of 5
Which of the options below completes the following statement: Intracellular expression by innate immune cells is characteristic of.
Correct Answer: D
Rationale: TLR3, TLR7, and TLR9 are intracellular (endosomal), detecting nucleic acids, unlike TLR4, TLR5, etc., which are surface-bound.
Question 2 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 3 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 4 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 5 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.