Pharmacognosy I Lecture 5: Leaves
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Questions and Answers

What is one of the active constituents of the plant?

  • Carbohydrates
  • Flavonoids (correct)
  • Fats
  • Proteins
  • What is one of the therapeutic uses of the plant due to its volatile oil?

  • Pain relief
  • Antibacterial
  • Insect repellent
  • Aromatherapy (correct)
  • Which of the following is NOT an active constituent of the plant?

  • Volatile oil
  • Flavonoids
  • Alkaloids (correct)
  • Phenolic acids
  • What is one of the therapeutic uses of the plant?

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

    How many therapeutic uses are mentioned for the plant?

    <p>3</p> Signup and view all the answers

    What are the three active constituents of the plant?

    <p>Volatile oil, flavonoids, and phenolic acids</p> Signup and view all the answers

    What is NOT a therapeutic use of the plant?

    <p>Pain relief</p> Signup and view all the answers

    What is the use of volatile oil in the plant?

    <p>Perfumery and aromatherapy</p> Signup and view all the answers

    How many active constituents are mentioned for the plant?

    <p>3</p> Signup and view all the answers

    What is the therapeutic use of the plant related to its antioxidant property?

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

    Study Notes

    Leaves Containing Alkaloids

    • Stramonium Leaf, Egyptian Henbane Leaf, Belladonna Leaf, Jaborandi Leaf, Boldo Leaf, Tea Leaf, and Coca Leaf are examples of leaves containing alkaloids.

    Leaves Containing Glycosides

    • Eucalyptus leaves are obtained from Mediterranean countries and contain volatile oils (0.5-4%), cineole (54-95%), tannins, and triterpenes and flavonoids (traces).
    • Eucalyptus is used as an astringent, antiseptic, decongestant, expectorant, and bronchodilator.
    • It is used to treat bronchitis and bronchial asthma as a herbal tea.
    • Eucalyptus oil is used in cough syrups and cough drops, and has antiviral effects against Herpes simplex.

    Thyme Leaves

    • Thyme leaves are obtained from the Mediterranean and European countries and contain volatile oils (thymol 20-54%), flavonoids, and tannins.
    • Thymol is used in mouth wash preparations due to its antiseptic activity.
    • Thyme tea is used to treat cough, bronchitis, and upper respiratory infections.
    • Thyme tea is used to treat dyspepsia after heavy meals, but it is not recommended for pregnancy (especially in the first trimester).

    Rosemary Leaves

    • Rosemary leaves are obtained from Southern Europe, France, and Spain and contain volatile oil, flavonoids, and phenolic acids.
    • Rosemary has powerful antioxidant properties and is used in perfumery and aromatherapy.

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    Description

    This quiz covers the leaves of various plants containing alkaloids and glycosides, including Stramonium, Belladonna, and Tea leaves. Learn about the characteristics and uses of these leaves in pharmacognosy.

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