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 D
Explanation
A. weaker the contraction: This is the opposite of the law; a lack of stretch usually results in a weaker stroke volume.
B. slower the heart rate: Starling's Law deals with stroke volume (the force of the pump), not the electrical timing of the heart rate.
C. faster the heart rate: Heart rate is primarily controlled by the SA node and the autonomic nervous system, not fiber stretch.
D. stronger the contraction: Also known as the Frank-Starling mechanism, this law states that the more the cardiac muscle is stretched (due to increased blood filling the heart), the more forcefully it will contract to pump that blood out.
Correct Answer is {"dropdown-group-1":"B"}
Explanation
A. intracellular: Intracellular fluid is the fluid contained strictly inside the cells.
B. extracellular: Extracellular Fluid (ECF) includes all fluid outside of cells, including plasma, interstitial fluid, and transcellular fluids like cerebrospinal fluid (CSF).
C. interstitial: Interstitial fluid is specifically the fluid that bathes the cells in tissues; CSF is considered a specialized transcellular fluid, not interstitial fluid.
D. Both A and C are correct: This is incorrect because CSF is not intracellular.
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