Herbalism Herbal Pharmacology & Plant Constituents 2 â Questions and Answers
Question 1: Mucilaginous herbs like marshmallow root (Althaea officinalis) and slippery elm work by:
- Stimulating mucus gland secretion in the respiratory tract
- Forming a protective polysaccharide coating over irritated mucous membranes (Correct answer)
- Breaking up and thinning existing mucus congestion
- Inhibiting inflammatory prostaglandin synthesis
Correct answer: Forming a protective polysaccharide coating over irritated mucous membranes
Mucilages are polysaccharides that swell in water, forming a viscous, soothing coating that protects and demulcifies inflamed mucous membranes.
Question 2: Hypericin, found in St. John's Wort (Hypericum perforatum), is classified chemically as:
- An isoquinoline alkaloid
- A naphthodianthrone polycyclic phenolic compound (Correct answer)
- A triterpenoid saponin
- A monoterpene volatile oil
Correct answer: A naphthodianthrone polycyclic phenolic compound
Hypericin is a naphthodianthrone compound and one of the constituents implicated in St. John's Wort's antidepressant and antiviral effects.
Question 3: Anthraquinone glycosides found in senna, cascara sagrada, and rhubarb root primarily act as:
- Bulk-forming diuretics that increase urinary output
- Stimulant laxatives that promote peristalsis in the colon (Correct answer)
- Broad-spectrum antimicrobials targeting intestinal pathogens
- Anti-inflammatory agents reducing intestinal inflammation
Correct answer: Stimulant laxatives that promote peristalsis in the colon
Anthraquinone glycosides stimulate peristalsis and reduce water reabsorption in the large intestine, producing a stimulant laxative effect.
Question 4: Rosmarinic acid, found in rosemary, lemon balm, and sage, is best described as a:
- Phenolic acid with antioxidant, anti-inflammatory, and antimicrobial properties (Correct answer)
- Monoterpene with primary sedative and anxiolytic properties
- Pyrrolizidine alkaloid with hepatotoxic potential
- Polysaccharide that stimulates immune function
Correct answer: Phenolic acid with antioxidant, anti-inflammatory, and antimicrobial properties
Rosmarinic acid is a caffeic acid ester with potent antioxidant, anti-inflammatory, and antimicrobial activity, found widely in the Lamiaceae family.
Question 5: Polysaccharides in immunomodulatory herbs like echinacea and astragalus primarily work by:
- Directly killing bacteria and viruses through lysis
- Stimulating and modulating macrophages, natural killer cells, and immune signaling (Correct answer)
- Suppressing overactive immune responses in autoimmune conditions
- Raising cortisol and adrenal hormone levels
Correct answer: Stimulating and modulating macrophages, natural killer cells, and immune signaling
High-molecular-weight polysaccharides activate macrophages, stimulate cytokine production, and enhance natural killer cell activity to modulate immunity.
Question 6: Which constituent class gives turmeric its bright yellow color and is primarily responsible for its anti-inflammatory activity?
- Isoquinoline alkaloids
- Hydrolyzable tannins
- Curcuminoids (Correct answer)
- Iridoid glycosides
Correct answer: Curcuminoids
Curcuminoids, particularly curcumin, are phenolic pigments in turmeric that inhibit NF-ÎșB signaling and COX enzyme pathways to reduce inflammation.
Question 7: Iridoids found in herbs such as valerian, devil's claw, and gentian are classified within which chemical family?
- Nitrogen-containing alkaloids derived from amino acids
- Cyclopentanoid monoterpenoid compounds (Correct answer)
- Ester-linked phenolic acids
- Long-chain saturated fatty acids
Correct answer: Cyclopentanoid monoterpenoid compounds
Iridoids are cyclopentanoid monoterpenoids that contribute bitter taste and various pharmacological effects including anti-inflammatory and analgesic actions.
Herbalism Herbal Pharmacology & Plant Constituents 2
Mucilaginous herbs like marshmallow root (Althaea officinalis) and slippery elm work by: