ATI RN
Immune System Questions and Answers Quizlet Questions
Question 1 of 5
Unlike B lymphocytes, T lymphocytes do not generate a secreted form of their antigen receptor after they are activated and proliferate. This is because the effector functions of T cells are restricted to:
Correct Answer: C
Rationale: T cells interact with cells (e.g., infected or immune cells) via TCR ; not limited to protozoa , helminths , or mucosa .
Question 2 of 5
Antibody diversity is generated by multiple mechanisms, each of which contributes to the generation of antibodies with up to 10^11 different amino acid sequences in their antigen-binding sites. Several of these mechanisms involve changes in the DNA sequences encoding the antibody heavy and light chain proteins. One mechanism that does not rely on changes to the DNA within the immunoglobulin heavy and light chain gene loci is, instead, dependent on:
Correct Answer: A
Rationale: Heavy/light chain pairing is post-DNA; VDJ , κ/λ , and TdT alter DNA.
Question 3 of 5
A heart attack is
Correct Answer: D
Rationale: A heart attack (myocardial infarction) involves cardiac muscle damage due to a blocked coronary artery, not brain tissue death (which is a stroke).
Question 4 of 5
The transfer of antibodies in breast milk to an infant is an example of immunity.
Correct Answer: B
Rationale: Antibodies from breast milk provide passive immunity, transferred without the infant's immune system activation, unlike active or nonspecific immunity.
Question 5 of 5
Which of the following statements about AIDS is true?
Correct Answer: C
Rationale: Condoms reduce HIV transmission, preventing AIDS; no vaccine or simple cure existed in 2012, and survival varies beyond 2-3 years with treatment.