Several cytokines participate in hematopoiesis particularly CSFs or

Several cytokines participate in hematopoiesis

This preview shows page 77 - 81 out of 177 pages.

Several cytokines participate in hematopoiesis, particularly CSFs (or hematopoietic growth factors); neutrophils do not play a role in hematopoiesis.REF:p. 48515.An unstable type of hemoglobin that cannot bind with oxygen is termed:a.Deoxyhemoglobinb.Oxyhemoglobinc.Methemoglobind.Glycosylated hemoglobin
Background image
ANS:CWithout reactivation, the Fe3+-containing hemoglobin (methemoglobin) cannot bind oxygen.Deoxyhemoglobin is reactivated hemoglobin whose oxygen has been released.Binding of oxygen to ferrous iron temporally oxidizes Fe2+to Fe3+as in oxyhemoglobin.Glycosylated hemoglobin is glucose bound to hemoglobin.REF:p. 48716.A staff member wants to know where the greatest proportion of iron is located. How should the nurse respond? The greatest proportion of total body iron is located in the:a.Erythrocytesb.Spleen pulpc.Bone marrowd.Liver tissueANS:AApproximately 67% of total body iron is bound to heme in erythrocytes (hemoglobin) and muscle cells (myoglobin).Approximately 67% of total body iron is bound to heme in erythrocytes (hemoglobin) and muscle cells (myoglobin), not the spleen pulp.Approximately 67% of total body iron is bound to heme in erythrocytes (hemoglobin) and muscle cells (myoglobin), not the bone marrow.Approximately 67% of total body iron is bound to heme in erythrocytes (hemoglobin) and muscle cells (myoglobin), not the liver tissue.REF:p. 487
Background image
17.A student asks the instructor about recycled iron. What information should the instructor share? Recycled iron from macrophages is delivered to the bone marrow bound to:a.Ferritinb.Hemoglobinc.Hemosiderind.TransferrinANS:DIron is transported in the blood bound to transferrin.Iron is transported in the blood bound to transferrin, ferritin is the storage form of iron.Iron is transported in the blood bound to transferrin, hemoglobin carries oxygen.Iron is transported in the blood bound to transferrin, hemosiderin is also a storage form of iron.REF:p. 48818.A nurse is preparing to teach about erythropoietin. Which information should the nurse include? Erythropoietin is produced in the:a.Liverb.Bone marrowc.Kidneysd.SpleenANS:CErythropoietin is produced in the kidneys.Erythropoietin is produced in the kidneys, not the liver.Erythropoietin is produced in the kidneys, not the bone marrow.Erythropoietin is produced in the kidneys, not the spleen.
Background image
REF:p. 48619.Which condition will cause a patient to secrete erythropoietin?a.Low blood pressureb.Hypercarbiac.Inflammationd.HypoxiaANS:DHypoxia stimulates production of erythropoietin.Hypoxia, not low blood pressure, stimulates production of erythropoietin.Hypoxia, not hypercarbia, stimulates production of erythropoietin.Hypoxia, not inflammation, stimulates production of erythropoietin.REF:p. 48620.After erythrocytes have circulated for about 120 days, they are removed by macrophages, which are mainly in the:a.Liverb.Spleenc.Appendixd.Bone marrowANS:BAged or damaged erythrocytes are removed from the bloodstream by macrophages of the MPS chiefly in the spleen.
Background image
Image of page 81

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture

  • Left Quote Icon

    Student Picture