Most of the Gastrointestinal Tract Is Innervated by the Sympathetic

question 84

Multiple Choice

Most of the gastrointestinal tract is innervated by the sympathetic and parasympathetic branches of the nervous system. Which parts are innervated by the somatic nervous system?

• A) esophagus and stomach
• B) pharynx and anal canal
• C) pyloric, ileocecal, and internal anal sphincters
• D) small and large intestines

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Definitions:

Polarity

A property of molecules showing the distribution of electrical charge, leading to molecules having a positive end and a negative end.

Lock And Key Model

A model for enzyme-substrate interaction suggesting that the enzyme and the substrate possess specific complementary geometric shapes that fit exactly into one another.

Molecular Structure

The three-dimensional arrangement of atoms within a molecule, determining its chemical properties and behavior.

Antibody

A protein produced by the body's immune system that recognizes and binds to foreign substances such as bacteria and viruses, neutralizing them.