Question

Name the hormone that stimulates the secretion of gastric juice.
(a)Renin
(b)Enterokinase
(c)Enterogastrone
(d)Gastrin

Answer 1

Hint: Gastric juices are secreted in the stomach in the presence of food. The gastric juices help in the digestion of food. They also help in killing the bacteria that usually enters with the food.

Complete answer:
The secretion of gastric juices is regulated by gastrin. It is a peptide hormone. Gastrin is produced by the G cells present inside the stomach and on the upper part of the small intestine. When food enters the stomach, the gastrin stimulates the secretion of gastric juices which help in the digestion of the food. It also helps in killing bacteria that enter with the food. The regulation of gastrin is controlled by hormone somatostatin which gets released when there is no food in the stomach.

Additional Information: -Renin is released by kidneys. Its function is to stimulate the release of aldosterone from the adrenal cortex. It is a proteolytic enzyme. Aldosterone is useful in the retention of the salts and elimination of potassium from the kidneys.
-Enterokinase is also known as enteropeptidase. This enzyme is produced in the duodenum. It converts trypsinogen into its active form of trypsin. This results in the activation of the pancreatic digestive enzymes. Enterokinase is involved in the digestion of protein substances. Enterokinase is released by the mucosal cells of the duodenum.
-Enterogastrone is an enzyme which is released from the duodenum when there are some fatty food substances present in the small intestine. Is Enterogastrone also released if some sugar and proteins substances remain undigested. It is released in the upper part of the small intestine and inhibits the movement of undigested food towards the anus. Therefore, inhibiting the gastric secretion and motility of the stomach.
The correct answer is 'gastrin' .

Note: Regulation of secretion of gastric juices occurs when there is presence of food in the stomach. If there is no food and the juices keep secreting it leads to acidity in the stomach. To avoid this condition negative feedback or inhibitory enzymes are present in the stomach to control the amount of gastric juice released.