Multiple Choice
Which component of gastric juice is most helpful in preventing the stomach from digesting itself?
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23. The Digestive System
The Stomach
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Which of the following substances are secreted by the stomach?
A
Bile
B
Pepsinogen
C
Amylase
D
Insulin
Verified step by step guidance1
Identify the primary functions of the stomach in the digestive system, which include the secretion of gastric juices to aid in digestion.
Understand that the stomach secretes several substances, including hydrochloric acid (HCl), intrinsic factor, and digestive enzymes.
Recognize that pepsinogen is an inactive enzyme precursor secreted by the stomach's chief cells, which is converted into pepsin in the presence of stomach acid to help digest proteins.
Differentiate between substances secreted by the stomach and those secreted by other organs: bile is produced by the liver and stored in the gallbladder, amylase is primarily secreted by the salivary glands and pancreas, and insulin is secreted by the pancreas.
Conclude that among the options provided, pepsinogen is the substance secreted by the stomach, as it plays a crucial role in the digestion of proteins within the gastric environment.
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