Which of the following tests is an effective screening for T-cell function?

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Pediatric Immunity NCLEX Questions Questions

Question 1 of 5

Which of the following tests is an effective screening for T-cell function?

Correct Answer: A

Rationale: Absolute lymphocyte count is a simple, effective screening test for T-cell function, as T cells constitute most lymphocytes. Low counts suggest T-cell deficiency.

Question 2 of 5

Delayed separation of umbilical cord, absence of pus at site (s) of infection, and poor wound healing suggest

Correct Answer: D

Rationale: Neutrophil defects, such as leukocyte adhesion deficiency, impair pus formation and wound healing due to ineffective neutrophil migration.

Question 3 of 5

Pancreatic insufficiency, metaphyseal chondrodysplasia, autosomal recessive inheritance, defective chemotaxis, and neutropenia are features of

Correct Answer: D

Rationale: Shwachman-Diamond syndrome includes pancreatic insufficiency, skeletal abnormalities, and neutropenia with defective chemotaxis.

Question 4 of 5

Wrong about neutrophils

Correct Answer: C

Rationale: Neutrophils are polymorphonuclear leukocytes, not mononuclear cells like monocytes/macrophages, so they are not part of the mononuclear phagocytic system.

Question 5 of 5

large family of molecules that stimulate leukocyte movement and regulate the migration of leukocytes from the blood to tissues and all of which are 8- to 12kD polypeptides, this definition best describes?

Correct Answer: B

Rationale: Chemokines are small (8-12 kDa) polypeptides that direct leukocyte migration and recruitment during immune responses.

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