BIO 252 FINAL EXAM QUESTIONS
AND ANSWERS
Describe the Enteric Nervous System - Ans:-Part of the ANS as a division/ parallel of the
Parasympathetic.
It is a LOCAL system, has more neurons that the spinal cord and is called the "small brain".
Since it is local it uses Local reflexes, but still d...
Pyloric Atrium which thins into the Pyloric Canal which ends at the Pyloric Sphincter.
What is the role of the Cardiac and Pyloric Sphincter? - Ans:✔✔-Cardiac acts like a one way valve to
allow food down the esophagus and into the stomach and doesn't let stuff come up because of the
acidity.
Pyloric is at the end of the stomach and connects to the small intestine, is used to let small portions at a
time into the small intestine for digestion
What are the 3 main roles of the stomach - Ans:✔✔-Storage - It is real big and the small intestine needs
time to digest/absorb so it stores a lot of food until the small intestine is ready.
Digestion of Proteins - very important for this but does little for carbs and lipids.
Immune - Very acidic to help combat all of the pathogens you eat. YUM
What type of tissues faces the lumen? - Ans:✔✔-Epithelial
What are the different types of muscles in the stomach and what do they do? - Ans:✔✔-Longitudinal -
fibers that extend length of stomach (most external)
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