BIOL 1001 Chapter : Biology Chapter 26 And 27 Updated Students
Document Summary
1st line of defense: non-cellular barriers to infection (skin, behavior, fever, cilia, clotting ,etc. ) Acute inflammatory processes (how and why)- protection of tissue due to injury, immediate reaction, first phase of wound healing. First blood vessels expand (from histamine released by mast cells) allowing fluid to flow out and clotting occurs. Leukocytes leave blood vessels and move toward injury following chemical (chemotaxis) then go through phagocytosis. Leukocytes (white blood cell)- protects body against infection. Comes from hematopoietic stem cell in the bone marrow. Can be further divided into myeloid cell and. Lymphoid cell: myeloid cells- can be granulocytic or monocytic. Lymphoid cells- can be t cell, b cell, or natural killer cell. Eventually turn into memory b cells for adaptive immune response later or plasma cells which make lots of antibodies against antigens. Mediators of humoral immunity: natural killer cell- once activated they release granules from within called perforin and granzyme.
