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Deepika Pandya What are the three sections of the small intestine and what role does each section play in digestion or absorption? What is the pH within the small intestine and how is this pH maintained? How does food move through the intestines? What enzymes act inside the small intestine and what are the functions of these enzymes? Where do bile and pancreatic enzymes enter the small intestine? How does the large intestine help maintain a water balance in the body? The small intestine has a pH 6.
Since the substance from the stomach is very acidic and the pancreas, gall bladder, and the linning of the intestines secretes a base (alkine) to act as a buffer.
Buffer lowers acid level The bile and pancreatic enzymes that are sent from the liver and gallbladder enter the duodenum in order to reach the small intestine.Duoenum is a small portion of the small intestine that is connected with the stomach.
Though the portion is such a tiny fraction of the small intestine, it is the site which most of the food goes through. Peristalsis- the involuntary contraction of the intestines creating wave-like movements Amylase- breaks down starch in food into smaller carbohydrate molecules. We need this enzyme
because it helps break big molecules into smaller ones so it’s easier for our food to digest.
Lactase- breaks down a sugar called lactose. Lactose is found usually in milk and other dairy
products. Some people lack lactase and are therefore lactose intolerant. You can take a capsule
filled with lactase to help your body produce lactase.
Lipase- this enzyme helps digest fats.
Protease- it aids in the digestion of proteins. The stomach does this too but protease further
breaks down proteins. The large intestine absorbs water out of fecal matter, you want to to have the right amount of water absorbed to have normal fecal matter. If too much water is absorbed constipation will occur and if not enough water is absorbed diarrhea will occur. Small Intestine responsibilities: removing nutrients from food and bringing water and electrolytes to body. Moves food to a specific part of digestive tract so it reaches the large intestine.
1- Duodenum: receives secretions from liver and pancreas using bile ducts also utilizing the secretions to extract nutrients from food. It is the short section that takes semi-digested food from stomach to pylorus continuing to digestive process
2- Jejunum: area of absorption that fills middle area of intestine, carries food through rapid wave like contractions by the muscles towards the ileum.
3- Ileum: passage from small to large intestine, where most food is absorbed before emptying into large intestine What is the function of the large intestine in relation to digestion? What are the tree sections of the large intestine and what roles does each play in digestion or absorption? 3 parts of the large intestine are the ascending colon, the transverse colon, and the descending colon. The Ascending colon are the muscle that motors waste products from the body upwards and onwards out of the body. Transverse colon reclaims water from the fecal material. The descending colon stores food particles. After water material is removed then it passes through the rectum and leaves the body
Bacteria in the large intestine produces vitamin K
Removes water from undigested material that is left