ATI RN
Immune System NCLEX Questions Questions
Question 1 of 5
Which of these is not a function of lymph nodes?
Correct Answer: C
Rationale: Lymph nodes house and produce lymphocytes, filter lymph , but red blood cell production occurs in bone marrow, not lymph nodes.
Question 2 of 5
Patients with recurrent infections of Neisseria meningitidis, an extracellular bacterial pathogen that causes meningitis, were found to have defects in complement activation on the bacterial surface, a process that for this bacterium is dominated by alternative complement activation leading to C3b deposition on the pathogen surface. Based on these data, the identity of the green neutrophil mediator in Figure Q2.19 is likely to be:
Correct Answer: D
Rationale: C3b is deposited on Neisseria via alternative pathway, aiding neutrophil phagocytosis; Factor B and properdin assist, but C3b is key.
Question 3 of 5
The exon encoding the V region of an immunoglobulin protein is generated by a process of somatic recombination. This recombination event brings V gene and J gene segments together:
Correct Answer: B
Rationale: V-J recombination maximizes CDR3 diversity ; not all cells , not splicing , or precise .
Question 4 of 5
Agricultural uses of plant hormones include
Correct Answer: D
Rationale: Plant hormones like ethylene, gibberellins, and auxins are used to control fruit processes, produce seedless fruits, and act as herbicides. All options are correct.
Question 5 of 5
Antibodies are
Correct Answer: D
Rationale: Antibodies are proteins made of polypeptide chains, specific to adaptive immunity, not amino acids, lipids, or carbohydrates.