Question

5. Укажите функцию, которую выполняют белки, содержащиеся в пищеварительном соке желудка человека. ​

Answer 1

Ответ:

Пищеварительная

Объяснение:

Answer 2

Function of Proteins in Gastric Digestive Juice

Proteins present in the gastric digestive juice of humans serve several important functions in the process of digestion. These proteins are primarily secreted by the gastric glands in the stomach and play a crucial role in breaking down food and facilitating nutrient absorption.

1. Pepsinogen and Pepsin: One of the key proteins found in gastric juice is pepsinogen, which is secreted by the chief cells in the gastric glands. Pepsinogen is an inactive precursor enzyme that is converted into its active form, pepsin, by the acidic environment of the stomach. Pepsin plays a vital role in the digestion of proteins by breaking them down into smaller peptides. This process is essential for the absorption of amino acids, which are the building blocks of proteins.

2. Gastric Lipase: Gastric lipase is another protein present in the gastric juice. It is secreted by the chief cells and helps in the digestion of dietary fats. Gastric lipase primarily acts on short- and medium-chain fatty acids, breaking them down into smaller components that can be further digested and absorbed in the small intestine.

3. Mucus and Bicarbonate: While not proteins themselves, mucus and bicarbonate are also present in the gastric juice and are secreted by the gastric glands. Mucus acts as a protective barrier, preventing the stomach lining from being damaged by the acidic environment and digestive enzymes. Bicarbonate, on the other hand, helps to neutralize the acidic pH of the stomach, creating a more favorable environment for the digestive enzymes to function properly.

In summary, the proteins present in the gastric digestive juice of humans, such as pepsinogen, pepsin, and gastric lipase, play a crucial role in breaking down food and facilitating nutrient absorption. Additionally, mucus and bicarbonate help protect the stomach lining and maintain the optimal pH for digestion.

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