Use the following information to answer the following questions.
An otherwise healthy student in your class is infected with EBV, the virus that causes infectious mononucleosis. The same student had already been infected when she was a child, and she had merely experienced a mild sore throat and swollen lymph nodes in her neck. This time, though infected, she does not get sick.
-Which of the following is the last line of defense against an extracellular pathogen?
A)lysozyme production
B)phagocytosis by neutrophils
C)antibody production by plasma cells
D)histamine release by basophils
E)lysis by natural killer cells

Question

Quizplus · Accepted Answer

Antibody production by plasma cells is the last line of defense against extracellular pathogens. This is because antibodies bind to the surface of the pathogens and can prevent them from infecting cells or mark them for destruction by other immune cells.

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