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2024/2025 BIO 252 FINAL EXAM WITH CORRECT ANSWERS
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2024/2025 BIO 252 FINAL EXAM WITH CORRECT ANSWERS
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2024/2025 BIO 252 FINAL EXAM WITHCORRECT ANSWERS
Describe the Enteric Nervous System - CORRECT ANSWERS- 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 does communicate
with the CNS some via the Vegas Nerve/Parasympathetic, so also
long nerves
It is independent of the nervous system, it still gets signals but
functions on its own ... wut (lets talk)
Long vs Local Reflex - CORRECT ANSWERS- Long involves the
CNS while the local does not,
Describe what happens when you smell ravioli - CORRECT
ANSWERS- Sense receptors signal to the CNS, CNS
communicates with ANS, the ANS sends long reflexes to cells of
the digestive system to start creating Gastric juices.
,Why is the Digestive Tract considered to be outside of your body?
- CORRECT ANSWERS- It is exposed to the outside world via the
mouth and the bumhole. Basically is just a disassembly line.
What are the 2 parts of the Digestive System? - CORRECT
ANSWERS- The Digestive Tract
The Accessory Organs (Teeth, Pancreas...)
How much digestion does the esophagus do? - CORRECT
ANSWERS- None, trick question, hehe
The food is only in your throat for a few seconds so there is no
digestion, only propulsion.
What are the 4 parts of the stomach? - CORRECT ANSWERS-
Cardia - Top part near Heart
(Cardiac Sphincter
Fundus - Upper region, Little digestion here, just stores juices.
Body - main region of digestion
Pyloric Region - Bottom, but of course it is again subdivided into...
Pyloric Atrium which thins into the Pyloric Canal which ends at the
Pyloric Sphincter.
What is the role of the Cardiac and Pyloric Sphincter? - CORRECT
ANSWERS- 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 - CORRECT ANSWERS-
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? - CORRECT ANSWERS-
Epithelial
What are the different types of muscles in the stomach and what
do they do? - CORRECT ANSWERS- Longitudinal - fibers that
extend length of stomach (most external)
Circular - oriented beneath longitudinal at 90 degrees.
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