Question 1
5 / 5 pts
Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might
develop gastric/stomach ulcers.
Your Answer:
Gastrin stimulates the secretaion of pepsinogenes and HCL. If it
...
Question 1
5 / 5 pts
Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might
develop gastric/stomach ulcers.
Your Answer:
Gastrin stimulates the secretaion of pepsinogenes and HCL. If it is excess amounr that
means it would be lead to erosion of the stomach.
Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess
amounts would lead to erosion of the stomach lining.
Question 2
5 / 5 pts
Explain in detail how the stomach contents enter the small intestine.
Your Answer:
There is the pyloric sphincter at thebase of stomach. Therefore, this valve relaxes
causing a small quantity of chyme to pass the opening into the first part of small
intestine. And then, this initiates a reflex. That is why the muscles of the sphincter to
contrcat and close the openinf temporarily. After sphincter relaxes again and it allows
more chyme to enter.
The pyloric sphincter (valve), located at the base of the stomach, relaxes causing
a small quantity of chyme to pass through the opening into the first part of the
small intestine.
This initiates a reflex that causes the muscles of the sphincter to contract and
close the opening temporarily. Then the sphincter relaxes again and allows more
chyme to enter.
Question 3
10 / 10 pts
Look carefully at the diagram below. Label the following 5 organs of the digestive
system.
To receive credit for the intestines you must label the specific region.
3: ___________
4: ___________
7: ___________
9: ___________
10: ___________
Your Answer:
3: Stomach
4: Gallbladder
7: Jejenum
9: Appendix
10: Rectum
3: Stomach
4: Gallbladder
7: Jejunum (not small intestine)
9: Appendix (not large intestine)
10: Rectum (not large intestine)
Question 4
5 / 5 pts
A patient is experiencing vitamin toxicity. What type of vitamin would be causing this
toxicity? Explain your answer.
A. Water soluble vitamin
B. Fat soluble vitamin
C. All of the above
Your Answer:
Fat soluble vitamin. These vitamins are stored within the body's fat stores making it
harder for the body to rid itself of them. Therefore it can cause vitamin toxicity.
B. Fat soluble vitamin.
Fat soluble vitamins are stored within the body’s fat stores making it harder for
the body to rid itself of them.
Question 5
5 / 5 pts
Explain which digestive system functions are carried out by the large intestine.
Your Answer:
Absorption: Water and electrolytes are reabsorbed and vitamins are absorbed.
Defecation ; Feces goes to the rectum then excreted va anus.
Absorption: In the large intestine water and electrolytes are reabsorbed and
vitamins are absorbed.
Defecation: Feces travel to the rectum where it is excreted via the anus.
Question 6
10 / 10 pts
Note: Essay answers must clearly be in your own words.
Answer the following essay question:
Describe parietal cells and chief cells: name their location, secretions and purposes.
Your Answer:
Parietal cells located in the wall of stomach body secrete HCL acid, generate a pH of
1.3-3.5. This acidite kills many bacteria. Also, the low pH stops the activity of salivary
amylase.Secretion of HCL acis is essential in the activate of pepsin.
Chief cells produces pepsinogen. Pepsinogen is secreted by the chief cells in the
stomach. HCL acid converts the inactive pepsinogen into the active enzyme pepsin and
then it begins breakdown of proteins.
The parietal cells (located in the wall of the stomach body) secrete hydrochloric
acid, generating a pH of 1.3-3.5. This very acidic pH kills many of the bacteria
ingested along with food. In addition, the low pH stops the activity of salivary
amylase. The secretion of hydrochloric acid is essential in the activation of
pepsin.
Chief cells: secrete pepsinogen. Pepsinogen (a pre-enzyme) is secreted by the
chief cells in the stomach. Hydrochloric acid converts the inactive pepsinogen
(secreted by the chief cells) into the active enzyme pepsin which begins the
breakdown of proteins.
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