The Cationic Form of a Local Anesthetic Is Needed to Penetrate

question 34

Multiple Choice

The cationic form of a local anesthetic is needed to penetrate the nerve membrane, and the free base form exerts blocking action by binding to the specific receptor site.

• A) Both parts of the statement are true.
• B) Both parts of the statement are false.
• C) The first part of the statement is true; the second part is false.
• D) The first part of the statement is false; the second part is true.

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Definitions:

Chitins

A long-chain polymer of N-acetylglucosamine, a derivative of glucose, and a primary component of the cell walls of fungi and the exoskeletons of arthropods.

Annelids

A phylum of invertebrate animals known as segmented worms, which includes earthworms, leeches, and their relatives, characterized by a segmented body and a coelom.

Two Openings

Refers to organisms with a digestive system that has a distinct mouth and anus, allowing for a one-way flow of food and waste.

Cnidarians

A phylum of aquatic invertebrates known for their distinctive body structure with a jelly-like substance called mesoglea, radial symmetry, and specialized cells called cnidocytes.