Introduction to Stem Cells Quiz
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Questions and Answers

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?

  • Progenitor cells
  • Mature differentiated cells
  • Multipotent cells
  • Stem cells (correct)
  • 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?

    <p>Self-renewal and potency</p> Signup and view all the answers

    Where are embryonic stem cells found during early development?

    <p>Inner cell mass of the blastocyst</p> Signup and view all the answers

    What is the capacity that a stem cell must possess to differentiate into specialized cell types?

    <p>Potency</p> Signup and view all the answers

    Where are embryonic stem cells typically found during early development?

    <p>Inner cell mass of the blastocyst</p> Signup and view all the answers

    What is the primary function of stem cells during embryogenesis?

    <p>Organ development</p> Signup and view all the answers

    What is the number of cells typically present in the blastocyst stage where embryonic stem cells are found?

    <p>~50-150 cells</p> Signup and view all the answers

    What type of stem cells are pluripotent and can develop into various cell types?

    <p>Embryonic stem cells</p> Signup and view all the answers

    During which phase of mitosis do chromosomes become visible as sister chromatids?

    <p>Prophase</p> Signup and view all the answers

    What is the main difference between mitosis and meiosis?

    <p>Meiosis occurs in germ cells, while mitosis occurs in somatic cells</p> Signup and view all the answers

    What is the function of mitotic spindle during cell division?

    <p>Separation of sister chromatids</p> Signup and view all the answers

    Which phase marks the end of mitosis and involves the division of cytoplasm to form two new daughter cells?

    <p>Telophase</p> Signup and view all the answers

    What is the ploidy level of daughter cells produced through mitosis?

    <p>Diploid</p> Signup and view all the answers

    Which of the following is the ethical principle indicating that patients have the right to choose or refuse a treatment?

    <p>Respecting autonomy</p> Signup and view all the answers

    How may beneficence be defined in the context of medical ethics?

    <p>Promoting well-being for a patient</p> Signup and view all the answers

    Stopping a medication that is found to be harmful is an example of:

    <p>Non-maleficence</p> Signup and view all the answers

    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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    Description

    Test your knowledge about stem cells and tissue renewal with this quiz. Topics include the definition of stem cells, their structure, and the different types of stem cells.

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