Quiz 7

25 July 2022
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question
Platelets are pinched off from giant multinucleated cells in the bone marrow called erythroblasts. normoblasts. lymphoblasts. megakaryocytes. myeloblasts.
answer
megakaryocytes
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Formed elements make up about what percentage of blood? 45 percent 55 percent 78 percent 60 percent 20 percent
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45 percent
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Which of the following is false concerning monocytes? are long-lived about same size as basophils become macrophages can phagocytize bacteria enter tissues and wander
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about same size as basophils
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Platelets function in all of the following except releasing chemicals that stimulate clotting. initiating the clotting process. forming temporary clump in injured areas. dissolving a formed clot. contracting after clot formation.
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dissolving a formed clot
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All of the following blood diseases are caused by pathogens except viremia. hemophilia. septicemia. malaria. bacteremia.
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hemophilia
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Eileen is a strict vegan and therefore eats no animal products. She develops an anemia that her doctor thinks is caused by a nutritional deficiency. Which of the following is the likeliest candidate? vitamin B12 deficiency vitamin B6 deficiency iron deficiency vitamin K deficiency lack of intrinsic factor
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vitamin B12 deficiency
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All of the following are heritable blood disorders except sickle cell anemia. sickle cell disease. malaria. hemophilia. thalassemia.
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malaria
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All of the following are true of neutrophils except that they are active in fighting bacterial infections. important in coagulation. granular leukocytes. phagocytic. round cells with lobed nuclei.
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important in coagulation.
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How would removal of calcium ions from a blood sample affect coagulation? There would be no effect because calcium is not a necessary cofactor in coagulation. Coagulation would be prevented. There would be no effect because magnesium can substitute for calcium. The coagulation pathway would be lacking a required cofactor at many steps. The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented.
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The coagulation pathway would be lacking a required cofactor at many steps and coagulation would be prevented.
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All of the following are components of the cardiovascular system except heart. capillaries. arteries. lymph vessels. blood.
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lymph vessels
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Hematology can detect all of the following except anemia. diminished erythropoiesis. body temperature. clotting disorders. infection.
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body temperature
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The process of fibrinolysis activates fibrinogen. dissolves clots. draws torn edges of damaged tissue closer together. forms thrombi. forms emboli.
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dissolves clots
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________ is a condition in which the oxygen-carrying capacity of the blood is reduced. Leukopenia Polycythemia Leukemia Anemia Thrombocytopenia
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anemia
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Each hemoglobin molecule contains two heme groups. four iron ions. one alpha and one beta chain. four alpha chains. one heme group.
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four iron ions
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An obstruction in blood flow to the kidneys would ultimately result in decreased erythropoiesis. increased erythropoiesis. renal anemia. increased sensitivity to vitamin K. decreased iron absorption.
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increased erythropoiesis
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The ________ is a procedure that is used to determine the number of mature erythrocytes. differential count reticulocyte count RBC count complete blood count platelet count
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RBC count
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People with type AB blood are considered the "universal recipient" for transfusions because their blood lacks A or B antibodies. they are usually Rh negative. their blood is plentiful in A and B antibodies. they usually have very strong immune systems. their blood cells lack A and B antigens.
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their blood lacks A or B antibodies.
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White blood cells that release histamine at the site of an injury are eosinophils. monocytes. neutrophils. basophils. lymphocytes.
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basophils
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The most numerous white blood cells in peripheral circulation are the monocytes. eosinophils. neutrophils. basophils. lymphocytes.
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neutrophils
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A person's blood type is determined largely by the shape of the RBCs. chemical character of the hemoglobin. size of the RBCs. volume of the RBCs. presence of specific glycoproteins on the cell membrane.
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presence of specific glycoproteins on the cell membrane.
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A person with Type A blood has anti-B antibodies in the plasma and anti-A antibodies on the red blood cells. antigen A on the RBCs. anti-B antibodies in the plasma. antigen A on the RBCs and anti-B antibodies in the plasma. anti-A antibodies on the red blood cells.
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antigen A on the RBCs and anti-B antibodies in the plasma.
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In adults, the only site of red blood cell production and the primary site of white blood cell formation is the spleen. the thymus. the liver. yellow bone marrow. red bone marrow.
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red bone marrow
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Which of the following is not true of basophils? promote inflammation increased production during parasitic infections granules contain histamine contain dense blue stained granules in the Wright stain constitute about 1 percent of WBCs
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increased production during parasitic infections
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Most of the protein factors that are required for clotting are synthesized by the spleen. the kidneys. megakaryocytes. platelets. the liver.
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the liver
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Which of the following proteins functions to store or transport oxygen? immunoglobulin hemoglobin albumin transferrin All of the answers are correct.
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hemoglobin
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The conversion of fibrinogen to fibrin is catalyzed by thrombin. plasmin. fibrinogen-converting enzyme. factor VIII. prothrombin activator.
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thrombin
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The process of white blood cell production and maturation goes on in all of the following except the lymph nodes. the thymus. the kidney. red bone marrow. the spleen.
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the kidney
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The disease sickle cell anemia is an example of what can happen if red blood cells bind too much oxygen. a gene for adult hemoglobin is abnormal. hemolysis is prevented by a bad gene. the diet is deficient in iron. there is insufficient heme in the hemoglobin.
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a gene for adult hemoglobin is abnormal.
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Pernicious anemia caused by a lack of intrinsic factor is specifically treated by oral doses of iron. injections of Vitamin K. injections of vitamin B12. injections of clotting factors. injections of iron.
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injections of vitamin B12.
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________ transport(s) oxygen and CO2 in the RBCs. Ribosomes Mitochondria Hemoglobin molecules Components of the cytoskeleton DNA
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Hemoglobin molecules
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Aged and damaged erythrocytes are broken down by macrophages in all of the following places except the spleen. kidney. liver. bone marrow. None of the answers is correct.
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kidney
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Which of the following descriptions best matches the term eosinophils? release histamine defend against specific pathogens or toxins and produce antibodies in response to antigens kill bacteria using cytotoxic chemicals become macrophages often elevated in allergic individuals
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often elevated in allergic individuals
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The combination of plasma and formed elements is called whole blood. packed blood. serum. extracellular fluid. lymph.
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whole blood
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Granulocytes form in yellow bone marrow. the intestines. the spleen. red bone marrow. the thymus.
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red bone marrow
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Which of the following statements about blood is false? It contains buffers that control pH. It is more viscous than water. It is about 55 percent plasma. Normal pH is 6.8 to 7.0. None of the statements are false; all are true.
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Normal pH is 6.8 to 7.0.
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RBCs typically live about 120 days. The main reason for this short lifespan in RBCs is their flexibility. lack of nucleus. cell shape. large surface area-to-volume ratio. concentration of Hb.
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lack of nucleus
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Which of these descriptions best matches the term lymphocytes? kill bacteria using cytotoxic chemicals become macrophages often elevated in allergic individuals release histamine defend against specific pathogens or toxins
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defend against specific pathogens or toxins
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In adults, erythropoiesis exclusively takes place in the spleen. lymphoid tissue. the liver. yellow bone marrow. red bone marrow.
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red bone marrow
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Which of the following vitamins is needed for the formation of clotting factors? A B K D E
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K
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If bile ducts are blocked, which of the following would not occur? less hemolysis would occur bilirubin appears in the skin increased jaundice yellow color of the sclera more bilirubin appears in the plasma
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increased jaundice
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________ involves a cascade of reactions leading to the conversion of fibrinogen to fibrin. Vascular spasm Coagulation Fibrinolysis The platelet phase Retraction
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coagulation
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The function of hemoglobin is to produce antibodies. aid in the process of blood clotting. defend against bacterial infection. distribute nutrients. carry oxygen.
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carry oxygen
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Red blood cell production is regulated by the hormone ________ which is mostly produced in the ________. renin; kidneys thymosin; thymus erythropoietin; liver erythropoietin; kidneys angiotensin; lungs
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erythropoietin; kidneys
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An elevated hematocrit value is termed anemia. hyperchromic. reticulocytosis. polycythemia. macrocytic.
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polycythemia
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Hemolytic disease of the newborn may result if the mother is Rh positive and the father is Rh negative. both the father and the mother are Rh negative. both the father and the mother are Rh positive. an Rh-negative mother carries an Rh-positive fetus. an Rh-positive mother carries an Rh-negative fetus.
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an Rh-negative mother carries an Rh-positive fetus.
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When a person who lives at sea level vacations in the Rocky Mountains, you would expect a drop in oxygen levels. a rise in hematocrit. the release of erythropoietin. All of the answers are correct. None of the answers is correct.
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All of the answers are correct.
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Plasma composes about ________ percent of whole blood, and water composes ________ percent of the plasma volume. 45; 55 92; 7 92; 55 50; 50 55; 92
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55; 92
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Which blood type contains RBCs with surface antigen B only and plasma that contains only anti-A antibodies? type O type B type AB type A
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type B
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The waste product bilirubin is produced from globin chains of hemoglobin. heme molecules lacking iron. heme molecules plus iron. iron found in hemoglobin molecules. abnormal proteins found in red blood cells.
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heme molecules lacking iron
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Which of the following statements concerning red blood cells is false? Red cells lack mitochondria. Red cells are specialized for carrying oxygen. Red cells can form stacks called rouleaux. Red cells are about 18 ยตm in diameter. Red cells are biconcave discs.
answer
Red cells are about 18 ยตm in diameter.