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2 days ago
The secretions of the digestive system are controlled by both sensory and hormonal mechanisms.
Sensory control involves the detection of various stimuli in the digestive tract, such as the presence of food, acidity levels, and stretching of the walls of the digestive organs. These sensory signals are transmitted to the brain and trigger the release of specific digestive secretions. For example, when food enters the stomach, sensory receptors in the stomach lining detect the presence of food and signal the release of gastric juices containing hydrochloric acid and enzymes to aid in digestion.
Hormonal control involves the release of specific hormones by endocrine cells in the digestive system in response to various stimuli. These hormones act on target cells in the digestive organs to stimulate or inhibit the secretion of digestive juices. For example, the hormone gastrin is released by the stomach in response to the presence of food and stimulates the release of gastric juices. Another hormone, secretin, is released by the small intestine in response to acidic chyme entering from the stomach and stimulates the release of bicarbonate-rich pancreatic juices to neutralize the acidity.
Overall, the sensory and hormonal control of digestive secretions work together to ensure that the digestive system functions efficiently and effectively in breaking down food and absorbing nutrients.
Sensory control involves the detection of various stimuli in the digestive tract, such as the presence of food, acidity levels, and stretching of the walls of the digestive organs. These sensory signals are transmitted to the brain and trigger the release of specific digestive secretions. For example, when food enters the stomach, sensory receptors in the stomach lining detect the presence of food and signal the release of gastric juices containing hydrochloric acid and enzymes to aid in digestion.
Hormonal control involves the release of specific hormones by endocrine cells in the digestive system in response to various stimuli. These hormones act on target cells in the digestive organs to stimulate or inhibit the secretion of digestive juices. For example, the hormone gastrin is released by the stomach in response to the presence of food and stimulates the release of gastric juices. Another hormone, secretin, is released by the small intestine in response to acidic chyme entering from the stomach and stimulates the release of bicarbonate-rich pancreatic juices to neutralize the acidity.
Overall, the sensory and hormonal control of digestive secretions work together to ensure that the digestive system functions efficiently and effectively in breaking down food and absorbing nutrients.
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1 day ago
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