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Digestive System
Digestive System is the category for questions regarding the breakdown and absorption of food-stuffs in our alimentary canal. Questions about the stomach and intestines can be included in this category.
7,599 Questions
What organ does most digestion take place?
Most chemical digestion occurs in the stomach and absorption occur in the intestines in humans and many other animals.
After eating, the levels of the gut hormones glucagon-like peptide 1 (GLP-1) and peptide YY (PYY) are increased. see: http://www.nature.com/ncpendmet/journal/v1/n2/full/ncpendmet0031.html
What will happen if your digestive system fails?
First your body would produce chemicals to break down muscles and fat but, after a certain amount of time you would die from starvation as your body would be unable to derive nutrients from the food. and then you would poop
What system are part of your excretory system?
There are some things in our body that can't be used and may even be dangerous to your body. They need to be rid of. The job of the excretory system is to get rid of that waste.
The Excretory System interacts with your Digestive System as they both work with the Nervous System in both conscious and unconscious ways. While digestion goes on without your thoughts, eating, urinating, and defecating is under your control.
The undigested food remains are expelled outside the body. The large intestine & anus are the last two organs related to the Digestive System. Solid waste is filtered out by the digestive system.
It also works with the Circulatory System as it carries blood around the body to function. All of our blood runs through our kidneys every day. There is an artery and a vein that runs into and out of each kidney to take the blood there and back.
Without the excretory system, the other parts of the body would eventually be poisoned by waste.
Ring of muscle in the stomach?
The ring of muscle at the entrance to the stomach is the lower esophageal sphincter. This muscle is normally contracted to close the esophagus. At the lower end of the stomach food passes through the pyloric sphincter and into the duodenum of the small intestine.
What are the role of mouth and in buccal cavity in the digestion of food?
The oral cavity with the teeth and tongue chew and mix food with saliva which has limited digestion of carbohydrates and lipids (amylase and lipase).
The tongue is involved in secretion of mucins and the enzyme lingual lipase (breaks down some fats).
The parotid salivary glands produce a serous secretion containing large amounts of salivary amylase (carbohydrates). The submandibular salivary glands secrete a mixture of buffers, glycoproteins called mucins, and salivary amylase.
Both mechanical and chemical digestion occur in the buccal cavity (mouth).
How long does it take for a chicken to digest food?
A chicken's digestive system is extremely efficient. Most chickens that eat fruit,fresh greens and soft vegetables can digest in thirty minutes, seeds and particularly hard veggies and fiber usually digests within three hours. A normal healthy bird eating continuously should have anywhere from 20 to 50 eliminations a day which shows how fast they process food.
Give an example of how homeostasis is maintained?
An example of homeostasis is regulating blood glucose concentration. The body does this as follows:
If there is enough glucose in the blood, the hormone insulin (from the pancreas) stimulates the liver to store the extra (not needed at the time) glucose as glycogen.
If the blood sugar gets low, another hormone stimulates the liver to release the glucose back into the blood.
If the storage in the liver is full, glucose is converted into fat in special cells around the body.
Where does digestion and absorption chiefly take place?
The Digestive System The main purpose of the Digestive system is to break down food and absorb nutrients. There are two basic divisions to the digestive system, these are the gastrointestinal (GI) tract, also known as the alimentary canal, and the accessory digestive organs. Your mouth, pharynx, esophagus, stomach, small intestine and large intestine compose the GI tract, and your teeth, tongue, salivary glands, liver, gall bladder and pancreas are accessory organs. The digestive system carries out six basic processes; ingestion, secretion, propulsion, digestion, absorption and defecation. Ingestion is taking food into the mouth. Secretion is the act of expelling a liquid. The cells lining the GI tract secrete about 9 liters (9.5 quarts) of water, acid, buffers, and enzymes each day to lubricate the canal and aid in the process of digestion. Propulsion consists of alternating contraction and relaxation of smooth muscle in the walls of the GI tract to squeeze food downwards. Digestionhas two parts, mechanical and chemical. Mechanical digestionis chewing up the food and your stomach and smooth intestine churning the food, while chemical digestion is the work the enzymes do when breaking large carbohydrate, lipid, protein and nucleic acid molecules down into their subcomponents -these and others are the nutrients-. Absorption occurs in the digestive system when the nutrients move from the gastrointestinal tract to the blood or lymph. Defecation is the process of expelling what the body couldn't use.
How does the appendix help in the digestive system?
The appendix is an offshoot of the first part of the large intestine and therefore in good position to destroy bacteria (which are present in large numbers in the intestine) it therefore prevents this bacteria from getting outside the intestine wall.
Basically, the appendix along with other groups of tissue (lymphoid tissue) helps protect the digestive tract from the huge amount of pathogens which enter it.
What are short term effects of not eating enough?
Short term effects - Dizziness, nausea, headache, dehydration, muscle weakness, confusion, dry skin, hair, and nails, low blood pressure, imbalance in electrolytes.
Long Term effects - all of the above, plus: growing soft downy hair all over the body, bloating, loss of muscle mass, paralysis, insomnia, kidney failure, osteoporosis (softening of bones), absence of menstrual cycle (if female), liver failure, easily bruised skin, bleeding gums, heart attack, infertility, digestive difficulties, seizures, death.
Where is digested food nutrients are absorbed into the body?
Carbohydrate
Digestion begins in the mouth by salivary amylase and completed in the small intestine by pancreatic amylase. Monosaccharides, such as glucose, galactose and fructose, are produced by the breakdown of polysaccharides and are transported to the intestinal epithelium by facilitated diffusion or active transport. Facilitated diffusion moves the sugars to the bloodstream.
Protein
Proteins are broken down to peptide fragments by pepsin in the stomach, and by pancreatic trypsin and chemotrypsin in the small intestine. The fragments are then digested to free amino acids by carboxypeptidase from the pancreas and aminopeptidase from the intestinal epithelium. Free amino acids enter the epithelium by secondary active transport and leave it by facilitated diffusion. Small amounts of intact proteins can enter interstitial fluid by endo- and exocytosis.
Fat
Fat digestion occurs by pancreatic lipase in small intestine. A monoglyceride and two fatty acids are produced in the digestive process. Large lipid droplets are first broken down into smaller droplets, by a process called emulsification. Emulsification is driven by mechanical disruption (by contractile activity of GI tract) and emulsifying agents (amphipathic bile salts). Pancreatic colipase binds the water-soluble lipase to the lipid substrate.
Digested products and bile salts form amphipathic micelles. These micelles keep the insoluble products in soluble aggregates from which small amounts are released and absorbed by epithelial cells via diffusion. Free fatty acids and monoglycerides then recombine into triacylglycerols at the smooth ER, are processed further in the Golgi and enter the interstitial fluid as droplets called chylomicrons, which are then taken up by the lacteals in the intestine.
Vitamins
Fat-soluble vitamins are absorbed and stored along with fats. Most water-soluble vitamins are absorbed by diffusion or mediated transport. Vitamin B12, because of its large size and charged nature, first binds to a protein, called intrinsic factor, which is secreted by the stomach epithelium, and is then absorbed by endocytosis.
Water
The stomach absorbs some water but most is absorbed at small intestine by diffusion.
How do you treat bad gas and cramps?
i am myself looking for a way to get rid of this but i found that when you start to feel gassy a hot cup of watter and real lemon slice in it can keep it to a min if not gets rid of it but it is temporary how ever any relife is helpful also think about how long ago you ate sometimes a small snack can give your tummy somthing to do other then burp but those are things that i have found to help me how you react i can not say good luck
What does the enzyme protein digest?
The general term is "proteases"
Pepsin cleaves at the "n" terminus produced by the stomach and works in an acidic pH environment.
Chymotrypsin and Trypsin are produced by the pancreas which is below the stomach and work in a more basic pH environment.
How much money an appendix removal?
Anywhere from $15,000 to $18,000 (maybe even more) in the U.S. My 20-year old daughter had this procedure while in Nicaragua for a school program and the total cost--surgeon and hospital, including post-operation visits--came to under $1,400, yes, that's $1,400, in a private hospital. The insurance company was the beneficiary of this low cost, not us.
Which type of digestion occurs in the mouth when an individual chews a piece of bread?
The type of digestion that chewing is referred to as is mechanical digestion.
What is the purpose of bicarbonate in the digestive process?
Bicarbonate's main role is to help neutralize the very acidic contents coming out of the stomach and into the small intestine. This serves a protective role -- to help protect the lining of the small intestine from being eaten away -- as well as a functional one -- the digestive enzymes at work in the small intestine operate better at a higher pH (less acidic).
Does the esophagus secrete digestive enzymes?
No it shouldn't. The salivary glands and pancreas and liver produce saliva, acid, and bile respectively. The reason you get "heartburn" is because acid from the stomach is being pushed into the esophagus so no, it does not produce digestive enzymes.
The nutrients are transported by the blood to all the cells of the body. The undigested food reaches into the ileo-cecal valve and enters the large intestine or colon. The colon absorbs water, manufactures vitamins, produces mucous, and form and expels feces. This can and does contain bacteria that can cause contamination
Functions of the digestion system?
The function of the human (or any animal's) digestive system is to digest food.
It does this by absorbing the nutrients present in the food and water so as to supply energy to various body cells. This is accomplished by the collective activity of muscles and enzymes, juices and salts.
What is the job of the throat in the digestive system?
The throat is the passage that leads from the back of the mouth in mammals.
