ATI RN
Lymphatic System Questions Questions
Question 1 of 5
Vonkupffer cell in
Correct Answer: A
Rationale: Kupffer cells are macrophages in the liver.
Question 2 of 5
Which complement proteins form a stalk that anchors the membrane attack complex (MAC) in the cell membrane of the invader?
Correct Answer: A
Rationale: C5b, C6, C7, and C8 form the MAC stalk ; others are involved earlier in complement cascades.
Question 3 of 5
What is the role of the CD3 complex?
Correct Answer: C
Rationale: CD3 transmits activation signals in T cells ; antigen recognition is TCR's role, not transport .
Question 4 of 5
What is the purpose of negative selection in the thymus?
Correct Answer: B
Rationale: Negative selection eliminates self-reactive T cells ; it refines tolerance, not just foreign attack , not self-attack , not B cells .
Question 5 of 5
Antibodies interact with antigens in all of these ways except
Correct Answer: C
Rationale: Antibodies don't release interferon (C, from infected cells); they opsonize , attract macrophages , and agglutinate antigens.