Cell Theory Formulators: Schwann and Schleiden
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Questions and Answers

What hypothesis did Louis Pasteur disprove with his swan-neck flask experiment?

  • Vital force theory
  • Microbial theory
  • Spontaneous generation (correct)
  • Cell division
  • Which scientist(s) initially proposed the Cell Theory?

  • Antonie van Leeuwenhoek
  • Shleiden and Schwann (correct)
  • Louis Pasteur
  • Virchow
  • What did Louis Pasteur's swan-neck flask experiment demonstrate?

  • Life can arise spontaneously from organic matter.
  • Life can only arise from preexisting life. (correct)
  • Microorganisms can navigate the bends in the flask neck.
  • Inanimate objects can produce living organisms.
  • What did Shleiden and Schwann propose about the origin of living creatures?

    <p>All living creatures are formed by cells.</p> Signup and view all the answers

    According to the Cell Theory, what is the structural unit of organisms?

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

    What principle states that all cells come from preexisting cells?

    <p>&quot;Omnis cellula ex cellula&quot; principle</p> Signup and view all the answers

    Who formulated the Cell Theory?

    <p>Theodor Schwann</p> Signup and view all the answers

    Which scientist discovered the myelin sheath in peripheral nerve fibers?

    <p>Theodor Schwann</p> Signup and view all the answers

    Who established the omnis cellula ex cellula theory?

    <p>Rudolf Virchow</p> Signup and view all the answers

    Which scientist is considered the father of Cellular Pathology?

    <p>Rudolf Virchow</p> Signup and view all the answers

    Which discipline emerged to study cells?

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

    Who expanded the cellular theory to include animals, unifying Botany and Zoology?

    <p>Theodor Schwann</p> Signup and view all the answers

    What is the primary role of adult stem cells in a living organism?

    <p>To maintain and repair the tissue where they are found</p> Signup and view all the answers

    Where are embryonic stem cells obtained from?

    <p>Inner mass of preimplantation-stage embryos</p> Signup and view all the answers

    What is the source of umbilical cord stem cells?

    <p>Umbilical cord</p> Signup and view all the answers

    What differentiates induced pluripotent stem cells from adult stem cells?

    <p>Genetically reprogrammed differentiated adult cells</p> Signup and view all the answers

    Why are ethical issues a concern for the widespread study of embryonic stem cells in humans?

    <p>They come from preimplantation-stage embryos</p> Signup and view all the answers

    Which type of adult stem cell can develop into some or all specialized cell types of a tissue or organ?

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

    Which of the following is NOT a characteristic of Transmission Electron Microscopy (TEM)?

    <p>The sample must be very thick</p> Signup and view all the answers

    What is the primary function of Fetal Bovine Serum (FBS) in cell culture media?

    <p>To promote cell proliferation through growth factors</p> Signup and view all the answers

    Which of the following best describes the principle behind Scanning Electron Microscopy (SEM)?

    <p>The specimen is bombarded with a beam of electrons, and scattered/emitted electrons are collected to generate a 3D image</p> Signup and view all the answers

    What is the approximate magnification range of Electron Microscopy?

    <p>Up to 100000x</p> Signup and view all the answers

    Which of the following components of cell culture media is responsible for maintaining the appropriate pH?

    <p>Bicarbonate buffer</p> Signup and view all the answers

    What is the purpose of including phenol red in cell culture media?

    <p>To detect medium acidification</p> Signup and view all the answers

    What are the four required reprogramming factors for induced pluripotent stem cells (iPS)?

    <p>Oct4, Sox2, cMyc, Klf4</p> Signup and view all the answers

    What type of stem cells are Tooth Stem Cells (TS)?

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

    Who received the Nobel Prize Award in 2012 for the discovery of induced pluripotent stem cells?

    <p>Dr. Yamanaka</p> Signup and view all the answers

    Which of the following is NOT a potential application of Tooth Stem Cells (TS)?

    <p>Producing immune cells</p> Signup and view all the answers

    What is the defining characteristic of induced pluripotent stem cells (iPS) and Embryonic Stem (ES) cells?

    <p>Pluripotent nature</p> Signup and view all the answers

    What major advantage do Tooth Stem Cells (TS) offer in regenerative medicine?

    <p>Autologous nature</p> Signup and view all the answers

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