Assertion The food digested by the stomach is highly acidic, when it passes through the duodenum it becomes nearly neutral. Reason Brunner’s gland in the duodenum produces mucin which is alkaline. (2024)

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Assertion The food digested by the stomach is highly acidic, when it passes through the duodenum it becomes nearly neutral. Reason Brunner’s gland in the duodenum produces mucin which is alkaline.? ›

They secrete an alkaline fluid containing mucin, which protects the mucosa from the acidic stomach contents entering the duodenum. It therefore, makes the enviroment in duodenum nearly alkaline. Hence, reason is the correct explanation of the assertion.

The pancreas further produces large amounts of bicarbonate and secretes bicarbonate through the pancreatic duct to the duodenum to neutralize gastric acid passing into the digestive tract.

The chyme which enters the duodenum is acidic in nature due to the action of hydrochloric acid in the stomach. But since the pancreatic enzymes work in an alkaline medium, chyme is transformed into an alkaline medium by the bile secreted into the small intestine.

Their main function is to secrete alkaline (bicarbonate-containing) mucous in order to: protect the duodenum from the acidic content of chyme (which enters the duodenum from the stomach), provide an alkaline environment which promotes the activity of intestinal enzymes, lubricate the intestinal walls.

When food moves into your duodenum, it mixes with digestive enzymes that your pancreas secretes. These enzymes break down the largest molecules of food, such as proteins and starches. They also neutralize stomach acid. Bile is a substance that breaks down the fats in foods.

One of those hormones is secretin, which is released when the pH of the duodenum decreases to a less than desirable level. This hormone acts to neutralize the pH of the duodenum by stimulating water and bicarbonate secretion into the duodenum.

Lemon water. Lemon juice is generally considered very acidic, but a small amount of lemon juice mixed with warm water and honey has an alkalizing effect that neutralizes stomach acid.

Once food enters the duodenum, its acidity is neutralized by mixing with alkaline juices from the pancreas and bile in preparation for further digestion and absorption lower down the small intestine.

This neutralization occurs via bicarbonate secreted into the mixture by epithelial cells of the duodenum and pancreas. Duodenal epithelial cells are also potentially directly exposed to this acidic chyme arriving from the stomach.

It's highly acidic and helps break down food for easier digestion. This helps your body absorb nutrients more easily as food moves through your digestive tract. In order to break down everything from meat to tough, fibrous plants, stomach acid has to be highly acidic.

What is the function of the duodenum in the digestive system? ›

The duodenum is the first part of your small intestine. Its main job is to transform the partially digested food it receives from your stomach into nutrients your body can use. Digestive juices from your liver, gallbladder and pancreas empty into your duodenum, helping with digestion and absorption.

Brunner glands secrete bicarbonate into the duodenum to neutralize stomach acid before chyme reaches the jejunum. The duodenum and upper jejunum are the main dietary iron absorption sites. [5] Bile from the liver also enters the duodenum through the hepatopancreatic ampulla.

Intestinal Glands

The submucosa of the duodenum is the only site of the complex mucus-secreting duodenal glands (Brunner's glands), which produce a bicarbonate-rich alkaline mucus that buffers the acidic chyme as it enters from the stomach.

The stomach stores swallowed food and liquid, mixes the food and liquid with digestive juice it produces, and slowly empties its contents, called chyme, into the small intestine. The muscle of the upper part of the stomach relaxes to accept large volumes of swallowed material from the esophagus.

Food passes through the esophagus and into the stomach. The stomach churns food and breaks it into smaller pieces. Most digestion takes place in the small intestine. The large intestine stores and eliminates undigested food as solid waste.

The duodenum defends itself by a layer of protective mucous; by acid sensors which can cause sphincter contraction; reduce acidity and its delivery to the duodenum.

The acidic contents from the stomach help in proper digestion and killing bacteria in food. When the acidic chyme is passed from stomach to duodenum, it is neutralized by sodium bicarbonate released from the pancreas.

If you have too much stomach acid, you can get heartburn and ulcers. Other intestinal diseases. Other diseases like Crohn's disease, ulcerative colitis, and gastroesophageal reflux disease, or GERD, are also associated with duodenitis.

Functions of the pancreas

These enzymes travel down the pancreatic duct into the bile duct in an inactive form. When they enter the duodenum, they are activated. The exocrine tissue also secretes a bicarbonate to neutralize stomach acid in the duodenum.

Secretin neutralizes the pH in the duodenum by optimizing the functionality of pancreatic amylase and pancreatic lipase. (1) Via the second messenger action of cAMP, bicarbonate release causes neutralization of the acidic environment, thus establishing a pH favorable for the action of digestive enzymes.