BIOD 151 Module 3 Exam Test Questions And Answers
Rated A
Explain why someone who has hypergastrinemia ANSWER -Absorption: In the large intestine
(excessive secretion of gastrin) might develop water and electrolytes are reabsorbed and
gastric/stomach ulcers. - ANSWER -Gastrin vitamins are absorbed.
stimulates the secretions of pepsinogens and Defecation: Feces travel to the rectum where it is
hydrochloric acid. Excess excreted via the anus.
amounts would lead to erosion of the stomach
lining.
Describe parietal cells and chief cells: name their
location, secretions and purposes. -
Explain in detail how the stomach contents enter ANSWER -The parietal cells (located in the
the small intestine - ANSWER -The pyloric wall of the stomach body) secrete hydrochloric
sphincter (valve), located at the base of the acid, generating a pH of 1.3-3.5. This very acidic
stomach, relaxes causing pH kills many of the bacteria
a small quantity of chyme to pass through the ingested along with food. In addition, the low pH
opening into the first part of the stops the activity of salivary
small intestine. amylase. The secretion of hydrochloric acid is
This initiates a reflex that causes the muscles of essential in the activation of
the sphincter to contract and pepsin.
close the opening temporarily. Then the Chief cells: secrete pepsinogen. Pepsinogen (a
sphincter relaxes again and allows more pre-enzyme) is secreted by the
chyme to enter. chief cells in the stomach. Hydrochloric acid
converts the inactive pepsinogen
(secreted by the chief cells) into the active
Be able to label the following: enzyme pepsin which begins the
Stomach breakdown of proteins
Gallbladder
Jejunum (not small intestine)
Appendix (not large intestine) Match the digestive organ with the one substance
Rectum (not large intestine - ANSWER - it produces:
Large intestine
stomach
A patient is experiencing vitamin toxicity. What small intestine
type of vitamin would be causing this
toxicity? Explain your answer. Vitamine K
A. Water soluble vitamin Secretin
B. Fat soluble vitamin Trypsin
C. All of the above - ANSWER -Fat soluble Salivary amylase
vitamins are stored within the body's fat stores Pepsinogen - ANSWER -Large intestine =
making it harder for vitamin K
the body to rid itself of them. stomach = pepsinogen
small intestine = secretin
Explain which digestive system functions are
carried out by the large intestine. - what is the purpose of the hormone leptin -
1/3
Rated A
Explain why someone who has hypergastrinemia ANSWER -Absorption: In the large intestine
(excessive secretion of gastrin) might develop water and electrolytes are reabsorbed and
gastric/stomach ulcers. - ANSWER -Gastrin vitamins are absorbed.
stimulates the secretions of pepsinogens and Defecation: Feces travel to the rectum where it is
hydrochloric acid. Excess excreted via the anus.
amounts would lead to erosion of the stomach
lining.
Describe parietal cells and chief cells: name their
location, secretions and purposes. -
Explain in detail how the stomach contents enter ANSWER -The parietal cells (located in the
the small intestine - ANSWER -The pyloric wall of the stomach body) secrete hydrochloric
sphincter (valve), located at the base of the acid, generating a pH of 1.3-3.5. This very acidic
stomach, relaxes causing pH kills many of the bacteria
a small quantity of chyme to pass through the ingested along with food. In addition, the low pH
opening into the first part of the stops the activity of salivary
small intestine. amylase. The secretion of hydrochloric acid is
This initiates a reflex that causes the muscles of essential in the activation of
the sphincter to contract and pepsin.
close the opening temporarily. Then the Chief cells: secrete pepsinogen. Pepsinogen (a
sphincter relaxes again and allows more pre-enzyme) is secreted by the
chyme to enter. chief cells in the stomach. Hydrochloric acid
converts the inactive pepsinogen
(secreted by the chief cells) into the active
Be able to label the following: enzyme pepsin which begins the
Stomach breakdown of proteins
Gallbladder
Jejunum (not small intestine)
Appendix (not large intestine) Match the digestive organ with the one substance
Rectum (not large intestine - ANSWER - it produces:
Large intestine
stomach
A patient is experiencing vitamin toxicity. What small intestine
type of vitamin would be causing this
toxicity? Explain your answer. Vitamine K
A. Water soluble vitamin Secretin
B. Fat soluble vitamin Trypsin
C. All of the above - ANSWER -Fat soluble Salivary amylase
vitamins are stored within the body's fat stores Pepsinogen - ANSWER -Large intestine =
making it harder for vitamin K
the body to rid itself of them. stomach = pepsinogen
small intestine = secretin
Explain which digestive system functions are
carried out by the large intestine. - what is the purpose of the hormone leptin -
1/3
