ATI MedSurg Test Bank, Hematologic Disorders
Questions With 100% Correct Answers And
Elaborations 2022/2023|Already Graded A|
1. Of the four major
... [Show More] blood components, plasma:
a. is made up of circulating ions.
b. comprises about 55% of blood volume.
c. is transported to the cells by serum proteins.
d. comprises about 45% of blood volume.
ANS: B
Blood has four major components: (1) a fluid component called plasma, (2) circulating solutes such as ions, (3)
serum proteins, and (4) cells. Plasma comprises about 55% of blood volume and is the transportation medium
for important serum proteins such as albumin, globulin, fibrinogen, prothrombin, and plasminogen. The
hematopoietic cells comprise the remaining 45% of blood volume.
DIF:Cognitive Level: ComprehensionREF:p. 460
OBJ: Explain the normal anatomy and physiology of the hematological and immune systems.
TOP: Nursing Process Step: Assessment MSC: NCLEX: Physiological Integrity
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2. Erythrocytes (RBCs) are flexible biconcave disks without nuclei whose primary component is an oxygencarrying molecule called:
a. erythropoietin.
b. a reticulocyte.
c. hemoglobin.
d. 2,3-DPG
ANS: C
Erythrocytes (RBCs) are flexible biconcave disks without nuclei whose primary component is an oxygen-carrying
molecule called hemoglobin. RBCs are generated from precursor stem cells under the influence of a growth
factor called erythropoietin. Erythropoietin is secreted by the kidney in response to a perceived decrease in
perfusion or tissue hypoxia. Reticulocytes are immature RBCs that may be released when there is a demand for
RBCs that exceeds the number of available mature cells. The oxygen affinity for hemoglobin is modulated
primarily by the concentration of 2,3-diphosphoglycerate (2,3-DPG) and depends on the blood pH and body
temperature.
DIF:Cognitive Level: KnowledgeREF:p. 464
OBJ: Explain the normal anatomy and physiology of the hematological and immune systems.
TOP: Nursing Process Step: Assessment MSC: NCLEX: Physiological Integrity
3. Erythrocytes (RBCs) are generated from precursor stem cells under the influence of a growth factor called:
a. reticulocytes.
b. hemoglobin.
c. 2,3-DPG.
d. erythropoietin [Show Less]