BIOD 151 Module 3 Exam: Requires Respondus
Lockdown Browser | Actual Questions and
Answers|2025 Update|100% Correct
Explain why someone who has hypergastrinemia (excessive
secretion of gastrin) might develop gastric/stomach ulcers. -
ANSWER >>>>>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 - ANSWER >>>>>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 - ANSWER >>>>>
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 - ANSWER >>>>>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. - ANSWER >>>>>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. - ANSWER >>>>>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
Lockdown Browser | Actual Questions and
Answers|2025 Update|100% Correct
Explain why someone who has hypergastrinemia (excessive
secretion of gastrin) might develop gastric/stomach ulcers. -
ANSWER >>>>>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 - ANSWER >>>>>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 - ANSWER >>>>>
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 - ANSWER >>>>>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. - ANSWER >>>>>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. - ANSWER >>>>>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
