MEDICINE
CARDIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Serum is plasma without fibrinogen
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The most abundant hemoglobin in adults is HbA.
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Carboxyhemoglobin increases in smokers in CO poisoning
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All blood cells derive from a pluripotent hematopoietic stem cell or stern cell.
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Hematopoiesis in the fetal months takes place mainly in the bone marrow of the axial bones.
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Detailed explanation-1: -At 10 weeks, hematopoietic progenitor cells gradually migrate from the aorta-mesonephros-gonad (AGM) region to colonize the liver, which becomes the major hematopoietic organ. Hematopoiesis shifts from foetal liver to bone marrow at 16 gestational weeks.
Detailed explanation-2: -The fetal liver is the major hematopoietic organ during development, supporting active erythro-myeloid hematopoiesis and HSC expansion.
Detailed explanation-3: -In adults, hematopoiesis occurs in the bone marrow-the central cavity of your bones. Hematopoiesis starts with hematopoietic stem cells (HSCs), proliferative and multipotent cells that are located in specialized bone marrow regions called ‘niches’.
Detailed explanation-4: -Bone Marrow. Early in fetal life, hematopoiesis begins as red blood cell precursors appear in the yolk sac at 2 weeks gestation.