BIO 251 - Unit Exam 4. Questions and Answers. All 100% Correct.

BIO 251 Unit Exam 4
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Part 1 of 3 - Part 1 40.0/ 40.0 Points
From chapter 23

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



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,Question 2 of 22
4.0/ 4.0 Points
The ___________ is the thin layer of the mucosa responsible for pulling the mucosa into its
many folds which increases the surface area of the alimentary canal.





A. Muscularis (externa)





B. Submucosa





C. Serosa





D. Muscularis mucosa





E. None of the above



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Question 3 of 22
4.0/ 4.0 Points
Where are carbohydrates first digested?





A. Esophagus

, 

B. Stomach





C. Mouth





D. Small intestine





E. Liver



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Question 4 of 22
4.0/ 4.0 Points
The correctly sequenced sections of the small intestine are: ____________, _____________,
____________.





A. Duodenum; jejunum; ileum





B. Ileum, jejunum; duodenum



