Understanding Stomach Enzymes and Cell Types - AP Biology
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Which of the following cells in the stomach is necessary for the activation of pepsinogen?
Which of the following cells in the stomach is necessary for the activation of pepsinogen?
Pepsinogen is released by chief cells in the stomach, and is the zymogen form of pepsin. Pepsinogen requires an acidic environment in order to be converted to pepsin. Parietal cells release hydrochloric acid into the stomach lumen, thus activating the enzyme.
G cells and goblet cells secrete gastrin and mucous, respectively, into the stomach.
Pepsinogen is released by chief cells in the stomach, and is the zymogen form of pepsin. Pepsinogen requires an acidic environment in order to be converted to pepsin. Parietal cells release hydrochloric acid into the stomach lumen, thus activating the enzyme.
G cells and goblet cells secrete gastrin and mucous, respectively, into the stomach.
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The high concentration of __________ present in the stomach activates pepsinogen, allowing it to become active pepsin.
The high concentration of __________ present in the stomach activates pepsinogen, allowing it to become active pepsin.
Hydrochloric acid, produced by the parietal cells of the stomach, activates the zymogen pepsinogen.
Hydrochloric acid, produced by the parietal cells of the stomach, activates the zymogen pepsinogen.
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The __________ cell of the stomach are responsible for secreting the __________ that lines the stomach and protects its epithelial cells from its highly acid contents.
The __________ cell of the stomach are responsible for secreting the __________ that lines the stomach and protects its epithelial cells from its highly acid contents.
The surface mucous cells secrete mucous, which covers the cells that line the stomach. Without proper mucous secretion, the stomach can become damaged or even perforated.
The surface mucous cells secrete mucous, which covers the cells that line the stomach. Without proper mucous secretion, the stomach can become damaged or even perforated.
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The parietal cells of the stomach secrete acid through the use of a __________.
The parietal cells of the stomach secrete acid through the use of a __________.
The parietal cells use a proton pump to release hydrogen ions into the stomach in the form of hydrochloric acid. This pump is the target of PPI (proton pump inhibitor) medications that work to reduce stomach acid.
The parietal cells use a proton pump to release hydrogen ions into the stomach in the form of hydrochloric acid. This pump is the target of PPI (proton pump inhibitor) medications that work to reduce stomach acid.
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Which compound is correctly matched to the type of cell that produces it?
Which compound is correctly matched to the type of cell that produces it?
The stomach contains several cell types, each with a specific mechanism of action.
Chief cells produce pepsinogen, which is converted to pepsin by hydrochloric acid in the stomach. Parietal cells produce hydrochloric acid, allowing this conversion. Goblet cells produce the mucous lining of the stomach that protects the stomach epithelium from damage from the acidic environment of the gastric lumen.
The stomach contains several cell types, each with a specific mechanism of action.
Chief cells produce pepsinogen, which is converted to pepsin by hydrochloric acid in the stomach. Parietal cells produce hydrochloric acid, allowing this conversion. Goblet cells produce the mucous lining of the stomach that protects the stomach epithelium from damage from the acidic environment of the gastric lumen.
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Which enzyme is correctly paired with the macromolecule that it digests?
Which enzyme is correctly paired with the macromolecule that it digests?
Amylase is an enzyme found in saliva and the small intestine that breaks starches down into sugars. The correct pairing for amylase would be carbohydrates.
Peptidases break peptide bonds, which are what hold amino acids together in proteins. Different peptidases are found in the stomach (pepsin) and the small intestine (trypsin). The correct pairing for peptidase is proteins.
Lipase is an enzyme that catalyzes the hydrolysis of triglycerides into free fatty acids in the small intestine. The correct pairing for lipase would be fats or lipids.
Amylase is an enzyme found in saliva and the small intestine that breaks starches down into sugars. The correct pairing for amylase would be carbohydrates.
Peptidases break peptide bonds, which are what hold amino acids together in proteins. Different peptidases are found in the stomach (pepsin) and the small intestine (trypsin). The correct pairing for peptidase is proteins.
Lipase is an enzyme that catalyzes the hydrolysis of triglycerides into free fatty acids in the small intestine. The correct pairing for lipase would be fats or lipids.
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Which of the following is most closely linked to the activation of pepsinogen?
Which of the following is most closely linked to the activation of pepsinogen?
Pepsinogen is an inactive enzyme (zymogen) that is released by chief cells into the stomach lumen. In order to be activated, the enzyme must be at a very low pH. This is accomplished by hydrochloric acid, which is released by the parietal cells in response to stimulation by gastrin. Parietal cells are, thus, most closely linked to the activation of pepsinogen.
Gastrin is released by G cells. Goblet cells secrete the mucous lining of the stomach.
Pepsinogen is an inactive enzyme (zymogen) that is released by chief cells into the stomach lumen. In order to be activated, the enzyme must be at a very low pH. This is accomplished by hydrochloric acid, which is released by the parietal cells in response to stimulation by gastrin. Parietal cells are, thus, most closely linked to the activation of pepsinogen.
Gastrin is released by G cells. Goblet cells secrete the mucous lining of the stomach.
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Which stomach cell type secretes gastrin?
Which stomach cell type secretes gastrin?
G cells secrete the hormone gastrin. Gastrin further stimulates stomach acid secretions via parietal (oxyntic) cells. Chief cells secrete pepsinogen, the inactive form of the enzyme pepsin, which degrades proteins. Goblet cells secrete mucous to protect the cells of the stomach from the acid.
G cells secrete the hormone gastrin. Gastrin further stimulates stomach acid secretions via parietal (oxyntic) cells. Chief cells secrete pepsinogen, the inactive form of the enzyme pepsin, which degrades proteins. Goblet cells secrete mucous to protect the cells of the stomach from the acid.
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Which of the following enzymes becomes activated in a low pH environment?
Which of the following enzymes becomes activated in a low pH environment?
The only one of the enzymes listed that becomes activated in the presence of an acidic (low pH) environment is pepsinogen. When activated, pepsinogen forms into pepsin which occurs in the stomach because of the 
(hydrochloric acid) present. Enzymes and/or hormones that have the suffix -ogen, or the prefix pro- are known as zymogens or prohormones, which are not active. Different environments/molecules activate these enzymes and proteins. This method of activation allows for more rapid usage, rather than having to synthesize these molecules from scratch when they are needed.
The only one of the enzymes listed that becomes activated in the presence of an acidic (low pH) environment is pepsinogen. When activated, pepsinogen forms into pepsin which occurs in the stomach because of the
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How is the zymogen protease activated in the stomach?
How is the zymogen protease activated in the stomach?
To become active, hydrochloric acid in the stomach reacts with pepsinogen to make pepsin.
To become active, hydrochloric acid in the stomach reacts with pepsinogen to make pepsin.
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In the stomach, the __________ cell secretes __________.
In the stomach, the __________ cell secretes __________.
The chief cells of the stomach secrete the proteolytic zymogen pepsinogen. This zymogen then becomes activated as pepsin in the stomach.
The chief cells of the stomach secrete the proteolytic zymogen pepsinogen. This zymogen then becomes activated as pepsin in the stomach.
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The __________ cell secretes __________ in order to reduce the pH of the stomach to increase food digestion.
The __________ cell secretes __________ in order to reduce the pH of the stomach to increase food digestion.
The parietal cells of the stomach begin secreting hydrochloric acid even upon the smell of food (before consumption takes place) in order to begin the digestion process. These cells are common targets of antacid medications to reduce acid reflux.
The parietal cells of the stomach begin secreting hydrochloric acid even upon the smell of food (before consumption takes place) in order to begin the digestion process. These cells are common targets of antacid medications to reduce acid reflux.
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In the stomach, the __________ cell secretes __________.
In the stomach, the __________ cell secretes __________.
The chief cells of the stomach secrete the proteolytic zymogen pepsinogen. This zymogen then becomes activated as pepsin in the stomach.
The chief cells of the stomach secrete the proteolytic zymogen pepsinogen. This zymogen then becomes activated as pepsin in the stomach.
Compare your answer with the correct one above
Which of the following cells in the stomach is necessary for the activation of pepsinogen?
Which of the following cells in the stomach is necessary for the activation of pepsinogen?
Pepsinogen is released by chief cells in the stomach, and is the zymogen form of pepsin. Pepsinogen requires an acidic environment in order to be converted to pepsin. Parietal cells release hydrochloric acid into the stomach lumen, thus activating the enzyme.
G cells and goblet cells secrete gastrin and mucous, respectively, into the stomach.
Pepsinogen is released by chief cells in the stomach, and is the zymogen form of pepsin. Pepsinogen requires an acidic environment in order to be converted to pepsin. Parietal cells release hydrochloric acid into the stomach lumen, thus activating the enzyme.
G cells and goblet cells secrete gastrin and mucous, respectively, into the stomach.
Compare your answer with the correct one above
Which compound is correctly matched to the type of cell that produces it?
Which compound is correctly matched to the type of cell that produces it?
The stomach contains several cell types, each with a specific mechanism of action.
Chief cells produce pepsinogen, which is converted to pepsin by hydrochloric acid in the stomach. Parietal cells produce hydrochloric acid, allowing this conversion. Goblet cells produce the mucous lining of the stomach that protects the stomach epithelium from damage from the acidic environment of the gastric lumen.
The stomach contains several cell types, each with a specific mechanism of action.
Chief cells produce pepsinogen, which is converted to pepsin by hydrochloric acid in the stomach. Parietal cells produce hydrochloric acid, allowing this conversion. Goblet cells produce the mucous lining of the stomach that protects the stomach epithelium from damage from the acidic environment of the gastric lumen.
Compare your answer with the correct one above
Which enzyme is correctly paired with the macromolecule that it digests?
Which enzyme is correctly paired with the macromolecule that it digests?
Amylase is an enzyme found in saliva and the small intestine that breaks starches down into sugars. The correct pairing for amylase would be carbohydrates.
Peptidases break peptide bonds, which are what hold amino acids together in proteins. Different peptidases are found in the stomach (pepsin) and the small intestine (trypsin). The correct pairing for peptidase is proteins.
Lipase is an enzyme that catalyzes the hydrolysis of triglycerides into free fatty acids in the small intestine. The correct pairing for lipase would be fats or lipids.
Amylase is an enzyme found in saliva and the small intestine that breaks starches down into sugars. The correct pairing for amylase would be carbohydrates.
Peptidases break peptide bonds, which are what hold amino acids together in proteins. Different peptidases are found in the stomach (pepsin) and the small intestine (trypsin). The correct pairing for peptidase is proteins.
Lipase is an enzyme that catalyzes the hydrolysis of triglycerides into free fatty acids in the small intestine. The correct pairing for lipase would be fats or lipids.
Compare your answer with the correct one above
Which of the following is most closely linked to the activation of pepsinogen?
Which of the following is most closely linked to the activation of pepsinogen?
Pepsinogen is an inactive enzyme (zymogen) that is released by chief cells into the stomach lumen. In order to be activated, the enzyme must be at a very low pH. This is accomplished by hydrochloric acid, which is released by the parietal cells in response to stimulation by gastrin. Parietal cells are, thus, most closely linked to the activation of pepsinogen.
Gastrin is released by G cells. Goblet cells secrete the mucous lining of the stomach.
Pepsinogen is an inactive enzyme (zymogen) that is released by chief cells into the stomach lumen. In order to be activated, the enzyme must be at a very low pH. This is accomplished by hydrochloric acid, which is released by the parietal cells in response to stimulation by gastrin. Parietal cells are, thus, most closely linked to the activation of pepsinogen.
Gastrin is released by G cells. Goblet cells secrete the mucous lining of the stomach.
Compare your answer with the correct one above
Which stomach cell type secretes gastrin?
Which stomach cell type secretes gastrin?
G cells secrete the hormone gastrin. Gastrin further stimulates stomach acid secretions via parietal (oxyntic) cells. Chief cells secrete pepsinogen, the inactive form of the enzyme pepsin, which degrades proteins. Goblet cells secrete mucous to protect the cells of the stomach from the acid.
G cells secrete the hormone gastrin. Gastrin further stimulates stomach acid secretions via parietal (oxyntic) cells. Chief cells secrete pepsinogen, the inactive form of the enzyme pepsin, which degrades proteins. Goblet cells secrete mucous to protect the cells of the stomach from the acid.
Compare your answer with the correct one above
Which of the following enzymes becomes activated in a low pH environment?
Which of the following enzymes becomes activated in a low pH environment?
The only one of the enzymes listed that becomes activated in the presence of an acidic (low pH) environment is pepsinogen. When activated, pepsinogen forms into pepsin which occurs in the stomach because of the (hydrochloric acid) present. Enzymes and/or hormones that have the suffix -ogen, or the prefix pro- are known as zymogens or prohormones, which are not active. Different environments/molecules activate these enzymes and proteins. This method of activation allows for more rapid usage, rather than having to synthesize these molecules from scratch when they are needed.
The only one of the enzymes listed that becomes activated in the presence of an acidic (low pH) environment is pepsinogen. When activated, pepsinogen forms into pepsin which occurs in the stomach because of the
Compare your answer with the correct one above
How is the zymogen protease activated in the stomach?
How is the zymogen protease activated in the stomach?
To become active, hydrochloric acid in the stomach reacts with pepsinogen to make pepsin.
To become active, hydrochloric acid in the stomach reacts with pepsinogen to make pepsin.
Compare your answer with the correct one above