Biol 235 Final Exam Questions with All Correct Answers

Biol 235 Final Exam Questions with All Correct Answers buffy coat - Answer a thin light colored layer of white blood cells and platelets than lie between a top layer of plasma and red blood cells in a centrifuged sample of blood. makes up <1% of the total volume of blood erhythrocytes - Answer red blood cells that transport oxygen from the lungs to the body cells and deliver carbon dioxide from the body cells to the lungs hemopoiesis - Answer process where the formed elements of blood develop - before birth, this occurs in the yolk sac of an embryo and later in the liver spleen, thymus and lymph nodes - after birth and so on, red bone marrow is where this happens thrombopoietin - Answer the hormone produced by the liver that stimulates the formation of platelets from megakaryocytes megakaryoblasts - Answer Develop into platelets; need TPO for myeloid stem cells to form into megakaryocytes that then develop into this neutrophils - Answer A type of white blood cell that engulfs invading microbes and contributes to the nonspecific defenses of the body against disease. what cells secrete lysozymes? - Answer paneth cells/ neutrophils intrinsic pathway - Answer - occurs slowly and most complex - activators are in direct contact with blood or contained within the blood - if endothelial cells are roughened or damaged, blood comes in contact with collage fibers in the connective tissue around endothelium of blood vessel - activates clotting factor XII which begins sequence of reactions that then activate clotting factor x - clotting factor x then conmbines and form prothrombinase prothrombinase - Answer the intrinsic and extrinsic pathways of blood clotting are identical after formation of this to produce thrombin and then fibrinogen extrinsic pathway - Answer factors released by damaged tissues begin cascade; occurs rapidly if trauma is severe - thromboplastin leaks into blood from cells outside the blood vessels and initiates the formation of prothrombinase thromboplastin begins sequence of reactions that activate clotting factor x - once factor x is activated, it combines with factor v in the presnece of Ca to form prothrombinase thrombus - Answer a formation of blood clot in an unbroken vein thrombosis - Answer clotting in an unbroke blood vessel agglutinins - Answer antibodies in the plasma that bring about transfusion mismatch agglutination - Answer clumping of RBCs in an incompatible blood transfusion; antibodies in the recipients plasma bind to the antigens on the antigens on the donated RBCs