Erythrocytes begin their maturation sequence in red bone marrow from nucleated cells known as:
hemoglobin.
osteons.
erythroblasts.
hematopoietic stem cells.
The Correct Answer is C
A. hemoglobin: This is the iron-containing protein within the cell that carries oxygen, not the cell itself.
B. osteons: These are the structural units of compact bone, unrelated to blood cell production.
C. erythroblasts: These are the immature, nucleated cells in the red bone marrow that eventually synthesize hemoglobin and eject their nuclei to become reticulocytes and then mature erythrocytes.
D. hematopoietic stem cells: While all blood cells originate here, the specific maturation sequence for red blood cells specifically identifies erythroblasts as the intermediate nucleated stage.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. hemostasis: This is the general term for the process of stopping bleeding, which includes clot formation, not dissolution.
B. fibrinolysis: Fibrinolysis is the enzymatic breakdown of the fibrin mesh in blood clots, primarily performed by the enzyme plasmin.
C. erythroblastosis: This refers to the abnormal presence of erythroblasts (immature red blood cells) in the blood, usually related to hemolytic disease.
D. diapedesis: This is the process of white blood cells "squeezing" through capillary walls to enter tissues.
Correct Answer is C
Explanation
A. usually involves the endocrine or nervous system: This describes extrinsic control, where signals come from outside the specific organ.
B. operates at the cellular level: While it involves cells, intrinsic control is specifically defined by an organ or tissue regulating itself.
C. is sometimes called autoregulation: Intrinsic control refers to "built-in" mechanisms within an organ that allow it to adjust its function without outside help (e.g., blood flow regulation within the heart).
D. operates at the system or organism level: This describes extrinsic or systemic regulation.
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