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Questions and Answers
What gives rhubarb its characteristic gritty taste?
What gives rhubarb its characteristic gritty taste?
- Medullary ray cells
- Vessels
- Starch granules
- Calcium oxalate (correct)
What is the botanical origin of Rhubarb?
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?
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?
Which family does Rhubarb belong to?
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What is the main purgative compound found in Rhubarb?
What is the main purgative compound found in Rhubarb?
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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.
