ATI RN
Lymphatic System Test Questions Questions
Question 1 of 5
Which immune-effector component does not belong to adaptive immunity?
Correct Answer: D
Rationale: Macrophages are part of innate immunity; T cells , antibodies , and B cells are components of adaptive immunity.
Question 2 of 5
What is the function of B7 proteins in T cell activation?
Correct Answer: C
Rationale: B7 binds CD28 for T-cell co-stimulation ; not TCR-nucleus , adhesion , or upregulation .
Question 3 of 5
What is the function of the mucus in the small intestine?
Correct Answer: C
Rationale: Mucus acts as a barrier with antimicrobial proteins ; protection is broader, SCFAs are microbiota-derived, not nutrient transport .
Question 4 of 5
Which lymph nodes could not be palpated with the fingers?
Correct Answer: D
Rationale: Mesenteric nodes are deep in the abdomen, not palpable; axillary , inguinal , and cervical are superficial.
Question 5 of 5
Vaccination against many infectious diseases has provided enormous benefit in developed countries, leading to the virtual eradication of diseases such as polio, measles, smallpox, and others. However, efforts to create long-lasting vaccines against some viral infections, like Influenza and HIV, have not been successful to date because:
Correct Answer: A
Rationale: Antigenic variation allows Influenza/HIV to evade immunity; speed , RNA , or mucosa are challenges but not primary.