Aged or damaged erythrocytes are removed from the bloodstream by macrophages of

Aged or damaged erythrocytes are removed from the

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Aged or damaged erythrocytes are removed from the bloodstream by macrophages of the MPS chiefly in the spleen, not the liver. Aged or damaged erythrocytes are removed from the bloodstream by macrophages of the MPS chiefly in the spleen, not the appendix. Aged or damaged erythrocytes are removed from the bloodstream by macrophages of the MPS chiefly in the spleen, not the bone marrow. REF: p. 482 21. Which electrolyte will the nurse check to ensure normal platelet functioning? a. Sodium b. Potassium c. Magnesium d. Calcium ANS: D Calcium is necessary for many of the intracellular signaling mechanisms that control platelet activation. Calcium, not sodium, is necessary for many of the intracellular signaling mechanisms that control platelet activation. Calcium, not potassium, is necessary for many of the intracellular signaling mechanisms that control platelet activation. Calcium, not magnesium, is necessary for many of the intracellular signaling mechanisms that control platelet activation. REF: p. 491
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22. Which of the following nutritional components will the nurse encourage a patient to consume as it is needed for erythropoiesis? a. Cobalamin b. Vitamin B 1 c. Vitamin D d. Zinc ANS: A Cobalamin is necessary for erythropoiesis. Cobalamin or vitamin B 12 is necessary for erythropoiesis, not B 1 . Cobalamin is necessary for erythropoiesis, not vitamin D. Cobalamin is necessary for erythropoiesis, not zinc. REF: p. 487 23. A newborn baby is diagnosed with a blood disorder in which her platelet count is low. Which of the following does the nurse suspect could be the reason? a. Increased megakaryocytes b. Increased platelet cell division c. Decreased thrombopoietin d. Decreased spleen function ANS: C Thrombopoietin (TPO), a hormone growth factor, is the main regulator of the circulating platelet mass, thus, a deficiency of TPO can lead to decreased platelets. TPO is the factor necessary for platelet production; megakaryocytes are platelet precursors, so if they are elevated, the platelets would be as well.
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Increased cell division would lead to increased platelets. Platelets are produced in the bone marrow, not the spleen. REF: pp. 481-482 24. A nurse is caring for a patient who cannot clot. Which end product of the clotting cascade is this patient unable to make? a. Collagen b. Fibrinogen c. Thrombin d. Fibrin ANS: D Fibrin is the end product of the coagulation cascade. Fibrin, not collagen, is the end product of the coagulation cascade. Fibrin, not fibrinogen, is the end product of the coagulation cascade. Fibrin, not thrombin, is the end product of the coagulation cascade. REF: p. 491 25. A nurse is discussing fibrinolysis. Which information should the nurse share? Fibrinolysis is mediated by: a. Heparin b. Fibrinogen c. Plasmin d. Albumin ANS: C
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Plasmin is an enzyme that promotes fibrinolysis by degrading fibrin and fibrinogen into fibrin degradation products.
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  • Fall '17
  • keisha lovence

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