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ATI LPN · Anatomy and Physiology · Immune System Questions and Answers Quizlet

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

Which of these is not a nonspecific defense against disease

A. species resistance

B. phagocytosis

C. interferon

D. hair color and texture

Expert Explanatory Rationale

Correct Answer: hair color and texture

Question 2 of 5

Give the predominant cell type found in the encircled region.

A. Lymphocytes

B. Macrophages

C. Epithelioreticular cells

D. Reticular cells

Expert Explanatory Rationale

Correct Answer: Lymphocytes

Question 3 of 5

Lymph from the left arm would return to the heart through the:

A. inferior vena cava

B. thoracic duct

C. right lymphatic duct

D. left subclavian vein

Expert Explanatory Rationale

Correct Answer: thoracic duct

Question 4 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:

A. The contributions of amino acids from both the heavy chain and the light chain to form the antigen-binding site

B. The random usage of V, D, and J gene segments to form the heavy chain V region sequence

C. The random usage of ÃŽÂº light chains versus ÃŽÂ» light chains to pair with the heavy chain

D. The activity of TdT to add random nucleotides at the junctions between the V, J, and D region sequences

Expert Explanatory Rationale

Correct Answer: The contributions of amino acids from both the heavy chain and the light chain to form the antigen-binding site

Question 5 of 5

Most normal tissues contain resident macrophages, and connective tissue sites in the gastrointestinal tract and the lung contain large numbers of these cells. Yet the blood also contains a high number of circulating 'classical' monocytes that can differentiate into macrophages after entering tissues. These circulating monocytes function to:

A. Phagocytose and kill pathogens in the blood

B. Line the endothelial surfaces of the blood vessels with phagocytic cells

C. Enter lymph nodes and patrol for infecting microbes in these organs

D. Amplify the local innate immune response by entering tissues that are infected

Expert Explanatory Rationale

Correct Answer: Amplify the local innate immune response by entering tissues that are infected

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