The following statement(s) is/are true concerning cellular defense mechanisms.
A. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen
B. Macrophages may become activated and secrete cytokines
C. Macrophages serve as phagocytic cells in the tissues but not within the bloodstream
D. Polymorphonucleocytes (PMNS) are normally present in only small numbers within the tissue and enter an area of infection through diapedesis
Answer:B
The following statement(s) is/are true concerning cellular defense mechanisms.
A. Macrophages function solely as antigen processing cells in the initial reaction to exposure to an antigen B. Macrophages may become activated and secrete cytokines C. Macrophages serve as phagocytic cells in the tissues but not within the bloodstream D. Polymorphonucleocytes (PMNS) are normally present in only small numbers within the tissue and enter an area of infection through diapedesis