Which Plasma Constituent Is The Main Contributor To Clotting?|answer 100% correct

Which Plasma Constituent Is The Main Contributor To Clotting? Which plasma constituent is the main contributor to clotting? • Albumin • Alpha globulins • Beta globulins • Fibrinogen Answer Fibrinogen comprises 4% of the plasma and is an important component in the process of blood clotting. Which of the following is not a function of blood? -protection from infection -transport of metabolic wastes -hormone production -homeostatic regulation -hormone production Correct The blood does not produce hormones but does provide for their transport throughout the body. Which plasma constituent is the main contributor to clotting? -albumin -alpha globulins -beta globulins -fibrinogen -fibrinogen Correct Fibrinogen comprises 4% of plasma and is an important component in the process of blood clotting. Which of the following plasma proteins is improperly matched with its function? -fibrinogen: clotting -alpha globulin: transport of metal ions and fat-soluble vitamins -gamma globulins: lipid transport -albumin: osmotic pressure -gamma globulins: lipid transport Correct Gamma globulins are also called immunoglobulins (or antibodies) and are part of the immune response. What triggers erythropoietin (EPO) production to make new red blood cells? -a high hematocrit -reduced availability -excess oxygen in the bloodstream -too many platelets -reduced availability of oxygen Correct Reduced oxygen delivery to the kidneys will result in the release of erythropoietin (EPO), which in turn promotes the release of more erythrocytes from the bone marrow. How many oxygen molecules can be transported by one hemoglobin molecule? -two -four -eight -four Correct Each iron atom on a heme group can bind reversibly with one oxygen molecule. Erythropoietin (EPO) stimulates the developmental process shown here. What part of the body does erythropoietin (EPO) target to increase erythropoiesis? -kidneys -lungs -liver -bone marrow -bone marrow Correct The bone marrow, specifically red marrow, is the site of blood cell production and is stimulated by erythropoietin. What erythrocyte production disorder results from an autoimmune disease associated with insufficient vitamin B12 absorption (step 6)? -pernicious anemia -hemorrhagic anemia -renal anemia -aplastic anemia -pernicious anemia Correct A glycoprotein called intrinsic factor, produced by the stomach, is required to absorb adequate vitamin B12. Pernicious anemia results when the stomach does not produce adequate intrinsic factor, often because the cells that produce it are attacked by the body’s immune system. Which of the following does NOT stimulate erythrocyte production? -hyperventilating -a drop in blood oxygen levels -erythroprotein -testosterone -hyperventilating Correct Hyperventilating leads to an above-normal level of oxygen in the blood, which would not stimulate RBC production. Bilirubin is released into the bloodstream as old or damaged red blood cells are broken down by macrophages. Which organ is responsible for removing bilirubin from the blood stream? -pancreas -spleen -liver -kidneys -liver Correct As RBCs are broken down, the heme of their hemoglobin is split off from globin. Its core of iron is salvaged and stored for reuse. The balance of the heme group is degraded to bilirubin, a yellow pigment that is released into the blood. Liver cells pick up the bilirubin and in turn secrete it (in bile) into the intestine, where it is metabolized to urobilinogen. Most of this degraded pigment leaves the body in feces, as a brown pigment called stercobilin. __________ is caused by a genetic mutation that results in the production of abnormal hemoglobin. Under low-oxygen conditions, the abnormal beta chains link together and form stiff rods that alter the shape of the RBCs. -leukopenia -polycythemia -thalassemia -sickle-cell anemia