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Questions and Answers
How long does it take for an Eosinophil to leave circulation once released from bone marrow?
What is the diameter of a platelet?
What is the lifespan of a macrophage?
Which of the following is not a symptom of anaemia?
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How long does it take for a cell to leave circulation once released from bone marrow?
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What is the characteristic of a totipotent stem cell?
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What is the correct order of events in haematopoiesis?
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Which of the following statements is true about red blood cells?
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Where does haematopoiesis occur in an adult?
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What is the diameter of a normoblast?
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Which of the following statements is false about red blood cells?
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Where does haematopoiesis occur in a foetus?
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What is the lifespan of an Eosinophil?
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Study Notes
Stem Cells
- A totipotent stem cell is a stem cell that can divide to produce all cell types of an organism.
Haematopoiesis
- The correct order of haematopoiesis is self-renewal, committed cells, developmental pathway, differentiated functional cell.
- Haematopoiesis in a foetus occurs in the liver throughout intrauterine life, and in an adult, it occurs in the interstitium between the medullary vascular sinuses of the bone marrow.
Red Blood Cells
- Red blood cells have a biconcave shape and are approximately 7 μm in diameter.
- Red blood cells do not have a nucleus.
- Red blood cells only respire anaerobically.
- Old and damaged red blood cells are removed by the liver and the spleen.
Normoblasts
- The diameter of a normoblast is 6-8 μm.
Eosinophils
- The lifespan of an eosinophil is several days.
- An eosinophil leaves circulation within 2-6 h of release from bone marrow.
Platelets
- The diameter of a platelet is 2-4 μm.
Macrophages
- The lifespan of a macrophage is days/weeks.
Anaemia
- Symptoms of anaemia include shortness of breath, dizziness, weakness, and yellow eyes.
- High blood pressure is not a symptom of anaemia.
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Description
Test your knowledge of biology with these questions about stem cells and haematopoiesis. Learn about the different types of stem cells and the process of blood cell formation.
