What do chief cells secrete in the stomach

What are dimensions of the small intestine? What are reasons to explain why the small intestine Where does the process of digestion begin? Are nutrients absorbed from the large intestine? How do nutrients, absorbed by the small intestine, travel to the individual cells of the human body? Is the pH of the small intestine lower or higher than that of the stomach? Why is the pH of the Why is the stomach such a muscular organ? How is the stomach lining adapted to its function? Which compound is correctly matched to the type of cell that produces it?

Possible Answers: Chief cells secrete pepsin. Correct answer: Chief cells secrete pepsinogen. Explanation : The stomach contains several cell types, each with a specific mechanism of action. Report an Error. Example Question 2 : Digestive Physiology. Which enzyme is correctly paired with the macromolecule that it digests? Possible Answers: Peptidase catabolizes proteins. Correct answer: Peptidase catabolizes proteins. Explanation : Amylase is an enzyme found in saliva and the small intestine that breaks starches down into sugars.

Example Question 3 : Digestive Physiology. Which of the following is most closely linked to the activation of pepsinogen? Possible Answers: Goblet cell. Correct answer: Parietal cell. Explanation : Pepsinogen is an inactive enzyme zymogen that is released by chief cells into the stomach lumen. Gastrin is released by G cells. Goblet cells secrete the mucous lining of the stomach. Example Question 4 : Digestive Physiology. Which of the following cells in the stomach is necessary for the activation of pepsinogen?

Possible Answers: Parietal cells. Correct answer: Parietal cells. Explanation : Pepsinogen is released by chief cells in the stomach, and is the zymogen form of pepsin.

G cells and goblet cells secrete gastrin and mucous, respectively, into the stomach. Example Question 5 : Digestive Physiology. Possible Answers: Oxyntic cells. Correct answer: G cells.

Explanation : G cells secrete the hormone gastrin. Example Question 6 : Digestive Physiology. Which of the following enzymes becomes activated in a low pH environment?

Possible Answers: Trypsinogen. Correct answer: Pepsinogen. Explanation : The only one of the enzymes listed that becomes activated in the presence of an acidic low pH environment is pepsinogen.

Example Question 7 : Digestive Physiology. Possible Answers: It is active upon secretion. It gets cleaved by trypsin to become catalytically active. It reacts with the hydrochloric acid to become pepsin. Correct answer: It reacts with the hydrochloric acid to become pepsin. Explanation : To become active, hydrochloric acid in the stomach reacts with pepsinogen to make pepsin. When stimulated, it releases pepsinogen, which is a zymogen that is converted to pepsin a digestive enzyme through the action of hydrochloric acid produced by the parietal cell s.

The gastric lipase that these chief cells secrete helps digest triglyceride s, converting them into simple fatty acids, diglyceride s and monoglyceride s. The gastric chief cells are also the ones that produce chymosin in ruminants, pigs, cat s, and seal s.

The chymosin is a protease produced by the gastric chief cells in the lining of the abomasum of newborns or young ruminants and certain non-ruminant animals. It curdles the milk and helps improve better absorption of the milk they ingest.

The gastric chief cells are regularly replaced. They are the mucous neck cells in the isthmus that migrate toward the base and transdifferentiate into gastric chief cells. Synonym s :.

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