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BIOD 151 Module 3 exam Questions & 100% correct Answers- Latest Test | Graded A+ | Passed
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Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might develop gastric/stomach ulcers. Ξ -:- Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess amounts would lead to erosion of the stomach lining. Explain in detail how the stomach conte...

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  • August 27, 2024
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  • 2024/2025
  • Exam (elaborations)
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E x c e l l e n c e i s k e y | 2 0 2 0 2 5 ~ P a g e |1




BIOD 151 Module 3 exam Questions &
100% correct Answers- Latest Test |
Graded A+ | Passed
Explain why someone who has hypergastrinemia (excessive secretion of gastrin) might develop
gastric/stomach ulcers.

Ξ -:- Gastrin stimulates the secretions of pepsinogens and hydrochloric acid. Excess

amounts would lead to erosion of the stomach lining.



Explain in detail how the stomach contents enter the small intestine

Ξ -:- 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.



Be able to label the following:

Stomach

Gallbladder

Jejunum (not small intestine)

Appendix (not large intestine)

Rectum (not large intestine

Ξ -:-



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


26/08/2024 | © Copyright- This work may not be copied for profit.

, E x c e l l e n c e i s k e y | 2 0 2 0 2 5 ~ P a g e |2


Ξ -:- Fat soluble vitamins are stored within the body's fat stores making it harder for

the body to rid itself of them.



Explain which digestive system functions are carried out by the large intestine.

Ξ -:- 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.



Describe parietal cells and chief cells: name their location, secretions and purposes.

Ξ -:- 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



Match the digestive organ with the one substance it produces:

Large intestine

stomach

small intestine



Vitamine K

Secretin

Trypsin

Salivary amylase

Pepsinogen




26/08/2024 | © Copyright- This work may not be copied for profit.

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