Which of the following statements about the human immune response is true?
A) Host cells are never destroyed by macrophages,even if they are damaged.
B) Neutrophils mount a specific response to particular species of invading organisms.
C) The immune response is more effective during the second exposure to an invader.
D) Lymphocytes are one of the components of blood clots.

Question

Quizplus · Accepted Answer

The immune response is more effective during the second exposure to an invader because memory cells are produced during the first exposure. Memory cells allow for a faster and stronger response during subsequent exposures.

Option A is incorrect because damaged cells may be destroyed by macrophages as a part of their role in phagocytosis. 
Option B is incorrect because while neutrophils do play a role in the non-specific response to invading organisms, they do not mount a specific response to particular species. 
Option D is incorrect because lymphocytes are not involved in blood clotting.

Which of the Following Statements About the Human Immune Response