The Digestive System Is Considered a Natural Nonspecific Defense System

question 4

Multiple Choice

The digestive system is considered a natural nonspecific defense system against microorganisms as a result of:

• A)the esophagus produces acid that kills microorganisms prior to establishing a gastrointestinal infection.
• B)the peristalsis of the intestines prevents attachment of organisms that are capable of surviving the acidic pH of the stomach.
• C)most organisms are resistant to the digestion by normal gastrointestinal secretions.
• D)the organisms are killed by exposure to saliva and pancreatic secretions before and after leaving the stomach.

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SmartArt Graphic

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