Physiology Immune System Flashcards
Immune system physical barriers
Skin
Mucous linings
Ciliated epithelium
Immune system chemical barriers
Lysozyme
Acids
Immune system mechanical barriers
Physical removal of pathogens
Innate immunity
Immediate response, responds to a range of signals
Adaptive immunity
Stronger response, attack specific pathogen or antigen and have memory of last illnesses
Four step in immune response
Detect and identify
Communicate with other immune cells
Recruit other immune cells and coordinate response
Destroy or suppress invader
Lymphoid tissues
Bone marrow, thymus, lymph nodes, spleen, appendix, and tonsils
Thymus
Glandular organ near the heart which activates T lymphocytes
Bone marrow
Blood-producing tissue located in certain bones
Spleen
Filter for the blood
Red pulp
Macrophages remove old and damaged red blood cells and trap and destroy infectious agents
White pulp
Lymphocytes
Lymphatic vessels
Collect fluid that has filtered out of the blood into the tissues and returns it to circulation
Lymph nodes
Permanent aggregate of immune cells that filter out dead cells and antigens to present to lymphocytes
Granulocytes
Eosinophils, basophils and mast cells, and neutrophils
Agranulocytes
Monocytes and macrophages
Lymphocytes
Dendritic cells
Morphological grouping
Granulocytes carry granules laden with killer chemicals
Phagocytes
Engulf and digest invaders
Cytotoxic
Attack and kill
Antigen-presenting cells
Display foreign particles on surface
Mononuclear phagocytes system
Macrophages in tissue and parent monocytes in blood
Eosinophils
Allergic reactions and parasitic diseases
Basophils and mast cells
Release histamine, inflammation, and innate immunity response
Neutrophils
Phagocytic and release cytokines and inflammatory mediators
Monocytes
Mature to tissue macrophages, phagocytic, and antigen-presenting cells
Lymphocytes
Acquired immunity
Dendritic cells
Found at interface between external and internal environments and antigen-presenting cells
Myeloblast
Immature white blood cell in the bone marrow and becomes granulocytes
Lymphoblast
Precursor of lymphocytes
Development of T lymphocytes
Migrate from bone thymus to mature
Development of B lymphocytes
Mature in bone marrow
Development of natural killer cells
Develop in bone marrow and other tissues
What causes the development of lymphocytes
Adaptive immune response
Chemotaxins
Stimulate increased inflammatory cell migration in the tissues and increases the inflammatory cascade
Opsonins
Facilitate recognition, binding, ingestion, and killing of microorganisms by phagocytes
Phagocytosis
Ingest foreign cells and chemicals
Inflammation
Infection or tissue damage that stimulates local non-specific reactions
Innate immunity macrophage
Attracted to infection site by chemicals from dying cells
After ingesting, they wear pieces of it so other immune system cells know what to target
Natural killer cells
Secrete interferons
Protect against viral infections, cancer
Kill cells by using perforin to make holes in cell membrane of target cell which then lyse the cell
Beneficial roles of inflammation
Attract immune cells and chemical mediators
Create physical barriers to prevent infection spread
Promote tissue repair
Acute-phase proteins
Help prevent tissue damage
Increase supply during infection and inflammation
Interleukins
Communication between leukocytes through fever, increased vessel permeability, and stimulation of liver to produce acute phase proteins
Bradykinin
Pain and swelling
Complement proteins
Complement work of antibodies in destroying bacteria
Membrane attack complex
Complement proteins insert into membrane, creating pores
Water and ions enter pathogen through pores
Cell swells and lyses