ATI RN
PAL Histology Lymphatic System Lab Practical Question 1 Questions
Question 1 of 4
Identify the two types of specific defense mechanisms.
Correct Answer: A
Rationale: Specific immunity includes antibody-mediated (B cells) and cell-mediated (T cells).
Question 2 of 4
The specific type of acquired immunity that a fetus obtains from maternal antibodies that cross the placenta is called:
Correct Answer: B
Rationale: Maternal antibodies provide natural passive immunity; active (A, C) involves own response, artificial is via injection, and E is invalid.
Question 3 of 4
Transmission of HIV
Correct Answer: B
Rationale: Needlestick risk reduced by therapy ; it's 0.3% , intrapartum is common , and transfusion risk remains .
Question 4 of 4
Following antigen presentation by a B cell to a T helper cell, cytokines are produced and the B cell:
Correct Answer: D
Rationale: B cell switches class and secretes antibody; doesn't kill T cell , rearrangement is earlier , or just secrete .