BIO 251 Unit Exam 4
American Military University
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BIO 251 - Unit Exams 1 to 5. Questions And Answers. Complete Solutions Bundle.
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BIO 251 - Unit Exam 1 Part 1. 
BIO 251 - Unit Exam 1: Part 2.
BIO 251 - Unit Exam 2: Part 1.
BIO 251 - Unit Exam 2: Part 2. 
BIO 251 - Unit Exam 3. 
BIO 251 - Unit Exam 4.
BIO 251 - Unit Exam 5.

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BIO 251 - Unit Exam 4. Questions with Answers. A+ Guide.
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BIO 251 - Unit Exam 4. Questions with Answers. A+ Guide. 
 
Question 1 of 22 
4.0/ 4.0 Points 
The stomach is protected from self-digestion by the ______________. When this breaks down, 
_________ can form and be painful. 
 
A. Muscularis mucosa; nodules 
 
B. Mucosal barrier; ulcers 
 
C. Duodenum; ulcers 
 
D. Serosa; nodules 
 
E. None of the above is correct 
Feedback: Good work; your answer is correct! 
Question 2 of 22 
4.0/ 4.0 Points 
The ___________ is the thin layer of t...
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