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Micro Test 4
NA
33
Microbiology
Undergraduate 4
11/02/2011

Additional Microbiology Flashcards

 


 

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Term
First & second lines of defense
Definition
Innate and nonspecific, always on guard. Do not improve with repeated exposure. Also involves inflammatory and phagocitic defenses
Term
First line of defense
Definition
All about barriers. Physical (anatomical), chemical, and genetic. Physical: thick skin, cilia, mucus, secretions. Chemical secretions are anything; lysozyme in tears, hcl in stomach, seamen, sweat, skin's ph etc. Genetic; geneticly resistant to something (typically viruses)
Term
Second line of defense
Definition
Inflammation, interferon, phagocytosis, complement defense.
Term
Third line of defense
Definition
Specific, acquired, T cells and B cells.
Term
Immunology
Definition
The study of all of the bodies 2nd and 3rd lines of defense. A healthy functioning immune system is responsible for: survellance of the body, recognition of foreign material, destion of entities deemed to be foreign.
Term
Self vs non self
Definition
Is identified by WBC's as they read "markers" on their surfaces, WBC's that ??
Term
Body compartments and communication
Definition
Reticuloendothelial system (RES), extracellular fluid (ECF), blood stream, lymphatic system
Term
Reticuloendothelial system
Definition
Network of connective tissue fibers that provide a passageway between tissues and organs. Ex: Thymus, lymph nodes and spleen. Has Macrophages (WBC's)
Term
The lymphatic system
Definition
Compartmentalized network of vessels cells and specialized acessory organs. Transport lymph through a system of vessels and lymph nodes. Primary functions include; returning ECF to circulatory system proper, act as a drain off system for inflammatory response, render survailence recognition and protection against foreign materials
Term
Lymphatic fluid
Definition
Plasma- like liquid formed wwhen certain blood components move out of blood vessels into the extracellular spaces and diffuse into the lymphatic capilaries. Like plasma but no RBC's.
Term
Lymphatic Vessels
Definition
Similar to thin-walled veins, and run along the lines of blood vessels. High numbers in hands, feet, and nipples.Only flows in direction from extremities towards the heart. Lymph is moved by the contraction of skeletal muscles which lymphatic vessels wend their way through.
Term
Lymphoid Organs
Definition
Thymus, spleen, lymoh nodes.
Term
Lymph Nodes
Definition
Small, encapsulated, bean shaped organs. Usually found in clusters along lymphatic channels and large blood vessels and thoracic and abdominal cavities. Major aggregations: axillary nodes, inguinal nodes, cervical nodes
Term
Spleen
Definition
Similar to lymph node but it filters blood instead of lymph. Filters pathogens from blood.
Term
The Thymus
Definition
Originates in the embryo, high rates of activity and growth until puberty. Shrinks gradually through adulthood. Thymic hormones help thymocytes develop specificity to be released as mature T cells.
Term
Miscellaneous lymphoid tissue
Definition
Tonsils, breasts of lactating women, GALT (gut associated= appendix, lacteals, peyer's patches) MALT (mucosal) SALT (skin) BALT (bronchial)
Term
Circulatory system & blood components
Definition
Consists of circulatory system proper and lymphatic system. Whole blood- blood cells suspended in plasma. Serum- plasma without clotting factors.
Term
Plasma
Definition
92% water, hundreds of chemicals, proteins (albumin & globulins) immunochemicals, fibrogen (& other clotting factors), hormones, nutrients, disolved gases & waste products
Term
Hematopoetic cells
Definition
Precursor stem cell in marrow. Differentiates into stem cells for blood cells and lymphoid cells
Term
Stem cell for blood cells
Definition
Differentiate into; erythroblasts (RBC's), Megakaryoblasts (platelets), myeloblasts (granulocytes & mast cells) monoblasts (monocytes, macrophages & dendrites)
Term
Lymphoid stem cell
Definition
Differentiate into lymphoblasts which differentiate into T and B cells.
Term
Granulocytes
Definition
The 3 "phils"
Term
Neutrophils
Definition
Granulocytes, most common, horse shoe nuclei. Phagocytoses bacteria- granules are digestive enzymes. First to arrive to immune response.
Term
Eosinophil
Definition
In bone marrow and spleen, attach and destroy eukaryotic pathogens, associated with inflammation and allergies.
Term
Basophil
Definition
Present in very low numbers in the body. Fuction is sismilar to epsinophils, localized basophils are mast cells, mast cells are important in allergic responses.
Term
Lymphocytes
Definition
Specific immunity, 2nd most common in body, AGRANULOCYTES
Term
Monocytes
Definition
Come out of bone marrow and survive as phagocytes for a few days and then they differentiate into macrophages.
Term
Erythrocytes
Definition
Develop from stem cells in the bone marrow, loose nuclei before they get into circulation. Transport oxygen and co2 to and from tissues
Term
Platelets
Definition
Fragments of membrane. Formed elements in circulating blood. Function primarily in hemostasis and releasing chemicals for blood clotting and inflammation.
Term
Second line of defense
Definition
Inflammation, interferon, phagocytosis, compliment. Relatively nonspecific but do communicate with 3rd line
Term
Inflammatory response
Definition
2nd line of defense. Classic signs & symptoms; rubor, calor, tumor, dolor & loss of function. Main function is to immune components to the site of injury, set in motion tissue repair & clear away harmful substances. Destroy microbes & block further invasion.
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