ATI RN
Chapter 15 The Lymphatic System and Immunity Review Questions Questions
Question 1 of 5
Anemia
Correct Answer: D
Rationale: Anemia is characterized by low hemoglobin or red blood cell levels, reducing oxygen-carrying capacity, not related to leukocytes or cancer.
Question 2 of 5
Why has it been so difficult for researchers to develop effective antivirals for HIV?
Correct Answer: B
Rationale: HIV's rapid mutation rate hinders antiviral development, more than its replication strategy, T cell damage, or transmission mode.
Question 3 of 5
From the options below, which pattern recognition receptor (PRR) gene family is expressed by innate immune cells?
Correct Answer: D
Rationale: Innate immune cells express NLRs (cytosolic), RLRs (viral RNA), and TLRs (surface/cytosolic), making all options correct.
Question 4 of 5
Complete the following sentence. The most common antibody isotype found in serum, with roles in opsonisation, complement activation and ADCC as well as neonatal immunity is.....
Correct Answer: C
Rationale: IgG, the most abundant in serum, performs opsonization, complement activation, ADCC, and crosses the placenta for neonatal immunity.
Question 5 of 5
Which of the statements below is true for costimulatory molecules?
Correct Answer: B
Rationale: Costimulatory molecules (e.g., B7-CD28) enhance T cell survival and expansion, not initial interaction or IL-2 reduction.