Introduction to Intermolecular Forces and Van der Waals Forces

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Questions and Answers

Which type of intermolecular force is responsible for gas liquification used in medicinally aerosols?

  • London forces
  • Van der Waals forces (correct)
  • Debye forces
  • Keesom forces

Where are the London forces commonly found in a cell membrane?

  • Aliphatic regions (correct)
  • Aromatic regions
  • Polar regions
  • Hydrophilic regions

Which type of intermolecular force affects drug-receptor binding through hydrophobic interactions?

  • Van der Waals forces
  • Keesom forces
  • Debye forces
  • London forces (correct)

What is another name for London forces that involve induced dipole-induced dipole interactions?

<p>Van der Waals forces (B)</p> Signup and view all the answers

Which intermolecular force type dominates the gas liquification process for medicinal use?

<p>Van der Waals forces (B)</p> Signup and view all the answers

What are the tiny openings on the epidermis of a plant called?

<p>Stomata (C)</p> Signup and view all the answers

Which of the following is true about stomata on plant surfaces?

<p>They are involved in photosynthesis (A)</p> Signup and view all the answers

What is the primary function of trichomes on plant surfaces?

<p>Protection against predators (A)</p> Signup and view all the answers

Which of the following is NOT a characteristic of stomata?

<p>Covered with pores (D)</p> Signup and view all the answers

In plant biology, what is the term for the outermost cell layer of a plant that contains stomata?

<p>Epidermis (A)</p> Signup and view all the answers

What is the main medicinal use of Senna leaves?

<p>As a laxative (D)</p> Signup and view all the answers

Which term best describes leaves that live for one year or more?

<p>Evergreen (D)</p> Signup and view all the answers

What is the function of Senna leaves in urinary tract complaints?

<p>Diuretic (C)</p> Signup and view all the answers

Which term defines a lateral outgrowth on the stem?

<p>Leaf (C)</p> Signup and view all the answers

In what way are Senna leaves different from other medicinal leaves?

<p>They are known for their laxative properties (B)</p> Signup and view all the answers

Which term describes the process of separating the constituents of Senna leaves to extract their medicinal properties?

<p>Extraction (D)</p> Signup and view all the answers

What is the main bioactive constituent in Senna leaves responsible for their laxative properties?

<p>Alkaloids (B)</p> Signup and view all the answers

How are Senna leaves commonly administered for their medicinal purposes?

<p>Oral consumption (C)</p> Signup and view all the answers

What is the primary pharmacological action of Senna leaves when used as a medicinal agent?

<p>Laxative (B)</p> Signup and view all the answers

Which pharmaceutical dosage form is most suitable for administering Senna leaf extracts to pediatric patients?

<p>Chewable tablets (D)</p> Signup and view all the answers

What is the family name of Cassia acutifolia and Cassia angustifolia?

<p>Leguminosae (Fabaceae) (C)</p> Signup and view all the answers

What are the main anthraquinone glycosides found in Senna leaves?

<p>Sennosides A and B (B)</p> Signup and view all the answers

In what doses does Senna act as a stimulant laxative and purgative, respectively?

<p>Stimulant in small dose, purgative in large dose (B)</p> Signup and view all the answers

Which type of leaf structure does Senna leaf exhibit?

<p>Isobilateral (C)</p> Signup and view all the answers

What is the term used to describe the mesophyll structure of Senna leaves?

<p>Dorsiventral (C)</p> Signup and view all the answers

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