ATI RN
Lymphatic System Exam Questions Questions
Question 1 of 5
A 7 year old child came to the pediatric clinic presenting with a typical picture of acute tonsillitis, choose the true statement related to this case:
Correct Answer: A
Rationale: Acute tonsillitis causes regional lymph node inflammation ; metastasis is cancer-related , eosinophilia/basophilia are less typical (C, D).
Question 2 of 5
What are NKT cells?
Correct Answer: A
Rationale: NKT cells recognize lipids via CD1 ; they share NK and T-cell traits but are defined by CD1 specificity.
Question 3 of 5
Which cells in the thymus are responsible for expressing tissue-specific antigens through the action of AIRE?
Correct Answer: A
Rationale: Medullary thymic epithelial cells express tissue-specific antigens via AIRE for negative selection.
Question 4 of 5
Vaccines generally confer what type of immunity?
Correct Answer: B
Rationale: Vaccines stimulate active immunity artificially ; passive (A, C) involves antibody transfer, natural active is from infection.
Question 5 of 5
Naive B and T lymphocytes are small, quiescent cells with little cytoplasm and low metabolic activity. Yet within hours after being activated following encounter with their antigen, these cells enlarge and up-regulate many biosynthetic and metabolic pathways. Approximately one day later, the cells begin dividing, and for several days they are the most rapidly dividing cells in the body, undergoing 2-4 rounds of cell division every day. In order to maintain this phenomenal rate of cell division, lymphoblasts must:
Correct Answer: C
Rationale: Lymphoblasts up-regulate glycolysis via glucose transporters/enzymes ; naive cells lack stores , don't engulf lymphocytes , or phagocytose broadly .