Podcast
Questions and Answers
How long does it take for an Eosinophil to leave circulation once released from bone marrow?
How long does it take for an Eosinophil to leave circulation once released from bone marrow?
- Leave circulation within 4-6 h of release from bone marrow
- Leave circulation within 2-6 h of release from bone marrow (correct)
- Leave circulation within 8-12 h of release from bone marrow
- Leave circulation within 2-4 h of release from bone marrow
What is the diameter of a platelet?
What is the diameter of a platelet?
- 2-4μm
- 1-2μm (correct)
- 0.01-0.02mm
- 1-2nm
What is the lifespan of a macrophage?
What is the lifespan of a macrophage?
- 3 weeks
- Months/years
- Days/weeks (correct)
- Seconds/minutes
Which of the following is not a symptom of anaemia?
Which of the following is not a symptom of anaemia?
How long does it take for a cell to leave circulation once released from bone marrow?
How long does it take for a cell to leave circulation once released from bone marrow?
What is the characteristic of a totipotent stem cell?
What is the characteristic of a totipotent stem cell?
What is the correct order of events in haematopoiesis?
What is the correct order of events in haematopoiesis?
Which of the following statements is true about red blood cells?
Which of the following statements is true about red blood cells?
Where does haematopoiesis occur in an adult?
Where does haematopoiesis occur in an adult?
What is the diameter of a normoblast?
What is the diameter of a normoblast?
Which of the following statements is false about red blood cells?
Which of the following statements is false about red blood cells?
Where does haematopoiesis occur in a foetus?
Where does haematopoiesis occur in a foetus?
What is the lifespan of an Eosinophil?
What is the lifespan of an Eosinophil?
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.
