Digestive System Physiology Exam 4
with Dr. Ahangari Spring UCF 2025/2026
Exam Questions with 100% Correct
Answers | Latest Update
What is the first part of the body that breaks down food for absorption? -
🧠ANSWER ✔✔Oral cavity by saliva enzymes.
What is the digestive system composed of? - 🧠ANSWER ✔✔Oral cavity,
pharynx, esophagus, stomach, duodenum, jejum, ileum, large intestin
(cecum, ascending, transverse, descending, sigmoid, rectum, anal canal,
anus), Liver (Gallbladder), Spleen, Pancreas.
What are the types of muscle found in small/larga intestine and
esophagus? - 🧠ANSWER ✔✔Smooth muscles such as;
,Longitudinal, Circular.
What are the types of muscle found in stomach? - 🧠ANSWER ✔✔Smooth
muscle such as;
Longitudinal, Circular, and Oblique
How dos the NS controls peristalsis of smooth muscle? - 🧠ANSWER ✔✔It
is controlled by Enteric NS
What is the function of Enteric System? - 🧠ANSWER ✔✔Controls
peristalsis and is formed of two plexus.
Meissner and Auerbach, located inside wall of GI which innervates smooth
muscle hence controls peristalses
How does ANS controls peristalsis? - 🧠ANSWER ✔✔Sympathetic system
has a negative effect on GI (inhibits hormone secretion) by Norepinephrine
through Enteric S.
Parasympathetic system has positive effect of GI (accelerates peristalses,
endocrine hormone secretion) by ACh through Vagus Nerve
, What is the difference of Sympathetic and Parasympathetic system in GI
tract? - 🧠ANSWER ✔✔Symp has negative effect; NT is Norepinephrine;
controlled through Enteric System
Parasympathetic has positive effect; NT is ACh; controlled by CNX (vagus)
What are the GI layers of Lumen? - 🧠ANSWER ✔✔Mucus membrane,
Muscular mucosa, Muscle layer (circular longitudinal), and Serosa
(connective tissues for external protection)
What are the types of fibers and functions of ANS? - 🧠ANSWER
✔✔Efferent fibers, takes info from CNS to PNS
Afferent fibers, takes info from PNS to CNS
What is the main nerve(s) for parasympathetic system in GIT? - 🧠ANSWER
✔✔CNX (Vagus) and Pelvic Splanchnic Nerve (S2,S3,S4)
What is the innervation of sympathetic ns? - 🧠ANSWER ✔✔T5-L2
What is the difference when Circular and Longitudinal Muscles contracts? -
🧠ANSWER ✔✔Circular contraction decreases diameter of segment
Longitudinal contraction decreases length of segment
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
with Dr. Ahangari Spring UCF 2025/2026
Exam Questions with 100% Correct
Answers | Latest Update
What is the first part of the body that breaks down food for absorption? -
🧠ANSWER ✔✔Oral cavity by saliva enzymes.
What is the digestive system composed of? - 🧠ANSWER ✔✔Oral cavity,
pharynx, esophagus, stomach, duodenum, jejum, ileum, large intestin
(cecum, ascending, transverse, descending, sigmoid, rectum, anal canal,
anus), Liver (Gallbladder), Spleen, Pancreas.
What are the types of muscle found in small/larga intestine and
esophagus? - 🧠ANSWER ✔✔Smooth muscles such as;
,Longitudinal, Circular.
What are the types of muscle found in stomach? - 🧠ANSWER ✔✔Smooth
muscle such as;
Longitudinal, Circular, and Oblique
How dos the NS controls peristalsis of smooth muscle? - 🧠ANSWER ✔✔It
is controlled by Enteric NS
What is the function of Enteric System? - 🧠ANSWER ✔✔Controls
peristalsis and is formed of two plexus.
Meissner and Auerbach, located inside wall of GI which innervates smooth
muscle hence controls peristalses
How does ANS controls peristalsis? - 🧠ANSWER ✔✔Sympathetic system
has a negative effect on GI (inhibits hormone secretion) by Norepinephrine
through Enteric S.
Parasympathetic system has positive effect of GI (accelerates peristalses,
endocrine hormone secretion) by ACh through Vagus Nerve
, What is the difference of Sympathetic and Parasympathetic system in GI
tract? - 🧠ANSWER ✔✔Symp has negative effect; NT is Norepinephrine;
controlled through Enteric System
Parasympathetic has positive effect; NT is ACh; controlled by CNX (vagus)
What are the GI layers of Lumen? - 🧠ANSWER ✔✔Mucus membrane,
Muscular mucosa, Muscle layer (circular longitudinal), and Serosa
(connective tissues for external protection)
What are the types of fibers and functions of ANS? - 🧠ANSWER
✔✔Efferent fibers, takes info from CNS to PNS
Afferent fibers, takes info from PNS to CNS
What is the main nerve(s) for parasympathetic system in GIT? - 🧠ANSWER
✔✔CNX (Vagus) and Pelvic Splanchnic Nerve (S2,S3,S4)
What is the innervation of sympathetic ns? - 🧠ANSWER ✔✔T5-L2
What is the difference when Circular and Longitudinal Muscles contracts? -
🧠ANSWER ✔✔Circular contraction decreases diameter of segment
Longitudinal contraction decreases length of segment
COPYRIGHT©JOSHCLAY 2025/2026. YEAR PUBLISHED 2025. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE. PRIVACY
3
STATEMENT. ALL RIGHTS RESERVED
