All these belong to the second line of defense except
A)the macrophage system.
B)natural killer cells.
C)inflammation.
D)the gastric juices.
E)interferon and the complement system.

Question

Quizplus · Accepted Answer

The gastric juices are part of the first line of defense, which includes physical and chemical barriers like skin and mucous membranes, not the second line of defense which involves internal mechanisms like macrophages, natural killer cells, inflammation, and proteins like interferons and the complement system.

All These Belong to the Second Line of Defense Except