Proteins are called the building blocks of the body. They’re needed for growth and development and to repair the normal wear and tear of the body. The body needs to digest proteins to make them available to fulfill these functions. Arrange the steps of the digestion of proteins in the correct order.
Answers
Answered by
4
digestive system- start to finish!
Mouth/Teeth. First steps in the digestivesystem take place in the mouth. ...Tongue— —A muscle that works with the food and saliva to form a "ball" ...Esophagus— The esophagus is simply a transportation tube from the. ...Stomach— ...Liver/Gall Bladder. ...Pancreas— ...Small Intestine. ...Large Intestin
Mouth/Teeth. First steps in the digestivesystem take place in the mouth. ...Tongue— —A muscle that works with the food and saliva to form a "ball" ...Esophagus— The esophagus is simply a transportation tube from the. ...Stomach— ...Liver/Gall Bladder. ...Pancreas— ...Small Intestine. ...Large Intestin
Answered by
5
Chewing
Chewing protein-rich foods such as beef, fish or cheese doesn’t change them chemically, but it physically breaks them up into smaller pieces -- exposing more surface area -- and prepares them for further digestion in your stomach and intestines. Saliva contains enzymes that begin digesting certain carbohydrates and fats while they are in your mouth, but it doesn’t contain any enzymes that act on protein. Saliva is also important for lubrication, which helps protein and other nutrients flow easily into your stomach.
Stomach Digestion
The second stage of protein digestion occurs in your stomach, although it’s the first place that protein is chemically changed. As long as it’s acidic enough -- pH measurement of 3.0 or less -- your stomach juices cause the long peptide chains in protein to unfold. The acidity also activates an enzyme called pepsin, which breaks down collagen tissue and reduces the long polypeptides into peptide fragments and clumps of amino acids. Protein spends about three or four hours in your stomach undergoing these chemical changes before it enters your small intestine. Drinking lots of liquid with a protein-rich meal is not a good idea because it dilutes stomach acid and compromises digestion.
Intestinal Digestion
The third stage of protein digestion occurs in the initial section of the small intestine -- called the duodenum. The partially digested protein comes into contact with different enzymes secreted from the pancreas, namely trypsin and chymotrypsin. These proteolytic enzymes cleave the peptide fragments and clumps into single amino acids, which are small enough to be absorbed through the intestinal wall. In contrast to the acidic environment needed in the stomach, alkaline conditions -- pH of over 7.0 -- are needed in the small intestine for this process to occur, so bicarbonate and other alkaline substances play an important role here.
Intestinal Absorption
Although some amino acids are absorbed in the duodenum, the majority are absorbed further along the small intestine in segments called the jejunum and ileum. The amino acids pass through the intestinal wall and directly into the blood, where they are then transported to the liver for processing, storage and distribution. Amino acids are used to build and repair protein-based tissues such as muscle, as well as compounds such as enzymes.
Evacuation
The material left over from the digestion and absorption of protein-rich food is mainly fiber and perhaps some gristle, which flows through the large intestine toward the bowel. Insoluble fiber attracts water and bulks up the stool, which tends to clean the inside of the large intestine and stimulate bowel movements. The time needed for complete protein digestion ranges between one and three days, depending on your metabolism, intestinal motility, hydration and activity level.
Chewing protein-rich foods such as beef, fish or cheese doesn’t change them chemically, but it physically breaks them up into smaller pieces -- exposing more surface area -- and prepares them for further digestion in your stomach and intestines. Saliva contains enzymes that begin digesting certain carbohydrates and fats while they are in your mouth, but it doesn’t contain any enzymes that act on protein. Saliva is also important for lubrication, which helps protein and other nutrients flow easily into your stomach.
Stomach Digestion
The second stage of protein digestion occurs in your stomach, although it’s the first place that protein is chemically changed. As long as it’s acidic enough -- pH measurement of 3.0 or less -- your stomach juices cause the long peptide chains in protein to unfold. The acidity also activates an enzyme called pepsin, which breaks down collagen tissue and reduces the long polypeptides into peptide fragments and clumps of amino acids. Protein spends about three or four hours in your stomach undergoing these chemical changes before it enters your small intestine. Drinking lots of liquid with a protein-rich meal is not a good idea because it dilutes stomach acid and compromises digestion.
Intestinal Digestion
The third stage of protein digestion occurs in the initial section of the small intestine -- called the duodenum. The partially digested protein comes into contact with different enzymes secreted from the pancreas, namely trypsin and chymotrypsin. These proteolytic enzymes cleave the peptide fragments and clumps into single amino acids, which are small enough to be absorbed through the intestinal wall. In contrast to the acidic environment needed in the stomach, alkaline conditions -- pH of over 7.0 -- are needed in the small intestine for this process to occur, so bicarbonate and other alkaline substances play an important role here.
Intestinal Absorption
Although some amino acids are absorbed in the duodenum, the majority are absorbed further along the small intestine in segments called the jejunum and ileum. The amino acids pass through the intestinal wall and directly into the blood, where they are then transported to the liver for processing, storage and distribution. Amino acids are used to build and repair protein-based tissues such as muscle, as well as compounds such as enzymes.
Evacuation
The material left over from the digestion and absorption of protein-rich food is mainly fiber and perhaps some gristle, which flows through the large intestine toward the bowel. Insoluble fiber attracts water and bulks up the stool, which tends to clean the inside of the large intestine and stimulate bowel movements. The time needed for complete protein digestion ranges between one and three days, depending on your metabolism, intestinal motility, hydration and activity level.
Similar questions