Which of the Following Statements About the Human Immune Response

Question

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.

Accepted Answer

The immune response is more effective during the second exposure to an invader due to the presence of memory cells, which can quickly recognize and mount a response to a previously encountered pathogen. Host cells can be destroyed by macrophages if they are infected or damaged, but not all host cells are targeted. Neutrophils are nonspecific and do not mount a specific response to particular species of invading organisms. Lymphocytes are not involved in blood clotting.