ATI RN
PAL Histology Lymphatic System Lab Practical Question 1 Questions
Question 1 of 5
Pattern recognition receptors bind to
Correct Answer: D
Rationale: Pattern recognition receptors (PARs) are genomically determined to bind to molecules widely expressed by microbes but not by host cells. Consequently, PARs cannot recognize host-associated molecules such as MHC class I molecules or cells of host origin such as B, T, or natural killer lymphocytes.
Question 2 of 5
Which of the following pairs of associations is mismatched?
Correct Answer: A
Rationale: Large granular lymphocytes are NK cells, not T cells, which are typically smaller.
Question 3 of 5
Which type of surface marker is present on every nucleated cell in your body?
Correct Answer: C
Rationale: MHC-I is on all nucleated cells; MHC-II is on APCs, receptors (A, B) are specific.
Question 4 of 5
Which type of antigen-presenting molecule is found on all nucleated cells?
Correct Answer: B
Rationale: MHC I is on all nucleated cells; MHC II is on APCs.
Question 5 of 5
The two collecting ducts that drain the lymphatic trunks are the
Correct Answer: A
Rationale: The thoracic duct and right lymphatic duct are the two main collecting ducts draining lymph into the bloodstream.