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Rhubarb Pharmacognosy Quiz
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Rhubarb Pharmacognosy Quiz

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@SubstantiveMarsh

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Questions and Answers

What gives rhubarb its characteristic gritty taste?

  • Medullary ray cells
  • Vessels
  • Starch granules
  • Calcium oxalate (correct)
  • What is the botanical origin of Rhubarb?

  • Rheum palmatum or R. officinale (correct)
  • Rheum hybrids
  • Rheum rhaponticum
  • Rheum with outer bark
  • What color do medullary ray cells give with a solution of caustic alkali?

  • Green
  • Brown
  • Yellow
  • Reddish-pink (correct)
  • Which family does Rhubarb belong to?

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

    What is the main purgative compound found in Rhubarb?

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

    Study Notes

    Rhubarb Characteristics

    • Rhubarb's characteristic gritty taste comes from the high concentration of calcium oxalate crystals in its cells.

    Botanical Origin of Rhubarb

    • Rhubarb is a perennial plant that originates from the genus Rheum in the family Polygonaceae.

    Medullary Ray Cells

    • Medullary ray cells in Rhubarb give a red color when treated with a solution of caustic alkali.

    Classification of Rhubarb

    • Rhubarb belongs to the family Polygonaceae.

    Purgative Properties of Rhubarb

    • The main purgative compound found in Rhubarb is anthraquinone derivatives, which contribute to its medicinal properties.

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    Description

    Test your knowledge of subterranean rhizoma rhei and radix rhei with this quiz. Identify the botanical origins, names, and characteristics of this important pharmacognosy topic. Sharpen your understanding of powdered rhubarb and its properties.

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