NSG 557 Hematology Test with Questions Solved 100% Correct
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Course
NSG 557
Institution
NSG 557
What are the formed elements of the blood?
Platelets
Leukocytes (neutrophils, eosinophils, basophils, lymphocytes, monocytes)
Erythrocytes
Platelets
Plate shaped membrane bound cell fragments formed from megakaryocytes
No nucleus
Not capable of mitotic division
Average lifespan is 4-5 days
NSG 557 Hematology Test with Questions Solved 100% Correct What are the formed elements of the blood? Platelets Leukocytes (neutrophils, eosinophils, basophils, lymphocytes, monocytes) Erythrocytes Platelets Plate shaped membrane bound cel l fragments formed from megakaryocytes No nucleus Not capable of mitotic division Average lifespan is 4 -5 days Megakaryocytes Enormous cells in the bone marrow that release packets of cytoplasm (platelets) into the circulating blood. Platelet function Essential for forming blood clots and controlling bleeding Form initial plug at site of injury Receptors on membranes When recepto rs are activated it induces confirmational changes that allow the platelets to stick to breaks in the blood vessel walls and stick together via fibrinogen Cytoplasmic granules are released and biochemical cofactors are released and that leads to additional steps in hemeostasis What percent of platelets circulate in the blood? about 66% or 2/3rd Where are platelets that aren't circulating in the blood? Sequestered in the spleen Leukocytes white blood cells Two cell groups that arise from Hematopoietic Stem C ell Myeloid group & Lymphoid group Myeloid group Erythrocytes (RBCs) Megakaryocytes (help form platelets) WBCs (Monocytes, neutrophils, basophils, eosinophils) Lymphoid group T-cells/lymphocytes B-cells/lymphocytes Leukocyte function Protect through phagoc ytosis and participation in immune response Where are leukocytes transported? vascular and lymphatic systems Erythrocytes AKA Red Blood Cells Non -nucleated, biconcave disk RBCs most numerous blood cell Transport O2 and remove CO2 Anaerobic ATP generation ( glycolysis) O2: RBCs transport 97%, 3% dissolved in plasma Unique property of RBCs Reversible deformity - can undergo conformational changes in shape that allow it to navigate through narrow capillaries and splenic sinusoids What can RBCs not do once in ci rculation? Synthesize hemoglobin What is the lifecycle of a RBC? 120 days RBC Morphologies Normal RBC Macrocyte
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