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Questions and Answers
What is the capacity of embryonic stem cells to differentiate into various cell types?
What is the capacity of embryonic stem cells to differentiate into various cell types?
- Totipotent
- Multipotent
- Unipotent
- Pluripotent (correct)
What is responsible for organ development during embryogenesis and cell renewal after birth?
What is responsible for organ development during embryogenesis and cell renewal after birth?
- Progenitor cells
- Mature differentiated cells
- Multipotent cells
- Stem cells (correct)
What is the histological structure of stem cells at the electron microscopy (EM) level?
What is the histological structure of stem cells at the electron microscopy (EM) level?
- Decreased ribosomes for protein synthesis
- Reduced cytoplasmic content
- Increased ribosomes for protein synthesis (correct)
- Large vacuoles for energy storage
What are the two properties a stem cell must possess?
What are the two properties a stem cell must possess?
Where are embryonic stem cells found during early development?
Where are embryonic stem cells found during early development?
What is the capacity that a stem cell must possess to differentiate into specialized cell types?
What is the capacity that a stem cell must possess to differentiate into specialized cell types?
Where are embryonic stem cells typically found during early development?
Where are embryonic stem cells typically found during early development?
What is the primary function of stem cells during embryogenesis?
What is the primary function of stem cells during embryogenesis?
What is the number of cells typically present in the blastocyst stage where embryonic stem cells are found?
What is the number of cells typically present in the blastocyst stage where embryonic stem cells are found?
What type of stem cells are pluripotent and can develop into various cell types?
What type of stem cells are pluripotent and can develop into various cell types?
During which phase of mitosis do chromosomes become visible as sister chromatids?
During which phase of mitosis do chromosomes become visible as sister chromatids?
What is the main difference between mitosis and meiosis?
What is the main difference between mitosis and meiosis?
What is the function of mitotic spindle during cell division?
What is the function of mitotic spindle during cell division?
Which phase marks the end of mitosis and involves the division of cytoplasm to form two new daughter cells?
Which phase marks the end of mitosis and involves the division of cytoplasm to form two new daughter cells?
What is the ploidy level of daughter cells produced through mitosis?
What is the ploidy level of daughter cells produced through mitosis?
Which of the following is the ethical principle indicating that patients have the right to choose or refuse a treatment?
Which of the following is the ethical principle indicating that patients have the right to choose or refuse a treatment?
How may beneficence be defined in the context of medical ethics?
How may beneficence be defined in the context of medical ethics?
Stopping a medication that is found to be harmful is an example of:
Stopping a medication that is found to be harmful is an example of:
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Study Notes
Instructor Information
- Instructor's name: Dr. Shireen Abdel Ghani Mazroa
- Department: Histology
- Official email: [email protected]
Learning Outcomes
- Define stem cells
- Demonstrate the structure of stem cells
- Determine types of stem cells
Stem Cells and Tissue Renewal
- There are 3 types of cells in the body classified according to their capacity for regeneration
Cell Classification
- Non-Renewing Cells: cannot divide and are not replaced by new cells after death (e.g. nerve cells, cardiac muscle)
- Potentially Renewable Cells: normally not dividing, but can divide and restore their normal number at a time of need (e.g. endocrine cells, liver cells)
- Continuously Renewing Cells: unable to divide, but when they die, they are replaced by Stem Cells of the same family
Stem Cell Definition
- Stem cells are undifferentiated cells that can differentiate into specialized cell type(s)
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