Practice Questions (Lab 4) Question 1 / 20     

DATA FOR ITEM 1. The TOP picture is included for orientation purposes only. The boxed region is shown at higher magnification in the BOTTOM picture.

(question value = 1 point)

1.   One important function of the cells indicated by the dashed GREEN line and labeled “1” in the BOTTOM picture is to

A form a barrier that prevents foreign antigens from entering the node.
B produce cytokines that regulate the growth and differentiation of the lymphocytes.
C provide the primary route by which recirculating lymphocytes LEAVE the node.
D provide a major route by which recirculating lymphocytes ENTER the node.
E maintain the proper osmotic balance within the lymph node through active transport of Na+ ions.

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