Chapter 5 Inflammation And Healing-Study Guide
CHAPTER 5 INFLAMMATION AND HEALING-STUDY GUIDE The human body has defense mechanisms to protect itself from injuries and/or pathogens. There are 3 lines of defense. • First line of Defense: is nonspecific. Includes skin, mucous membranes, body secretions like saliva or tears that contain enzymes and/or chemicals that destroy potential pathogens. An example of a break in first line of defense is insertion of an indwelling bladder catheter, as it is a foreign body inserted into a sterile cavity. • Second line of Defense: is nonspecific. Includes processes of phagocytosis & inflammation. Includes: neutrophils, macrophages, and interleukins. • Third line of Defense: is a specific defense mechanism. Produces unique antibodies and/or lymphocytes (white blood cell) following exposure to a specific substance (such as a bacterium or a virus). Includes B lymphocytes( provide defense against. pathogens), T lymphocytes, memory T cells, helper T cells, and cytotoxic T cells.
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