test 2 Flashcards
primary Gi organs
mouth, esophagus, stomach, small intestine, large intestine, rectum and anus
Helping GI organs
pancreas, gall bladder and liver
receive food by ingestion, break it into small particles by mastication, and mix it with saliva
mouth
carry food and liquid from your mouth to your stomach. When you swallow, food and liquid first move from your mouth to your throat
esophagus
hat digests food. It is part of your gastrointestinal (GI) tract. When your stomach receives food, it contracts and produces acids and enzymes that break down food. When your stomach has broken down food, it passes it to your small intestine.
stomach
the part of the intestines where 90% of the digestion and absorption of food occurs absorption of nutrients and minerals from food
small intestine
absorb water and makes the waste a solid that will exit your body
large intestine
The rectum is the last straight section of the large intestine before reaching the anus.
rectum
lets shit out
anus
to process the nutrients absorbed from the small intestine
liver
hold bile produced in the liver until it is needed for digesting fatty foods in the duodenum of the small intestine
gallbladder
further breaks down food after it has left the stomach
pancreas
play a key role in breaking down the food you eat. These proteins speed up chemical reactions that turn nutrients into substances that your digestive tract can absorb. Your saliva has digestive enzymes in it. Some of your organs, including your pancreas, gallbladder, and liver, also release them.
enzyme role
are proteins comprised of amino acids linked together in one or more polypeptide chains.
enzymes
enzymes
Amylase, produced in the mouth. It helps break down large starch molecules into smaller sugar molecules.
Pepsin, produced in the stomach. …
Trypsin, produced in the pancreas. …
Pancreatic lipase, produced in the pancreas. …
Deoxyribonuclease and ribonuclease, produced in the pancreas.
helps your body to break down, digest, and absorb nutrients such as protein. It also eliminates bacteria and viruses in the stomach, protecting your body from infection. Low levels of hydrochloric acid can have a profound impact on the body’s ability to properly digest and absorb nutrients.
HCL
fluid through the bodies; the clear liquid found in the lymphatic system, is moved along in the lymph vessels by the squeezing action of smooth muscles and skeletal muscles.
lymph system
blood vascular system is literally a circular system in which the fluid (blood) leaves the heart; runs through the arteries, arterioles, capillary plexus, venules, and veins; and returns to the hear
vascular system
vascular system vits
vitamins B, C, D, E, and K
lymph vits
A, D, E, and K
controlled by the neural response to the stimulus provided by food. All aspects—such as sight, sense, and smell—trigger the neural responses resulting in salivation and secretion of gastric juices. The gastric and salivary secretion in the cephalic phase can also take place due to the thought of food. Right now, if you think about a piece of chocolate or a crispy potato chip, the increase in salivation is a cephalic phase response to the thought. The central nervous system prepares the stomach to receive food.
cephalic phas
begins once the food arrives in the stomach. It builds on the stimulation provided during the cephalic phase. Gastric acids and enzymes process the ingested materials. The gastric phase is stimulated by (1) distension of the stomach, (2) a decrease in the pH of the gastric contents, and (3) the presence of undigested material. This phase consists of local, hormonal, and neural responses. These responses stimulate secretions and powerful contractions.
gastric phase
begins when chyme enters the small intestine triggering digestive secretions. This phase controls the rate of gastric emptying. In addition to gastrin emptying, when chyme enters the small intestine, it triggers other hormonal and neural events that coordinate the activities of the intestinal tract, pancreas, liver, and gallbladder.
intestinal phase
controls the response of the various glands in the body and the release of hormones at the appropriate times.
One of the important factors under hormonal control is the stomach acid environment. During the gastric phase, the hormone gastrin is secreted by G cells in the stomach in response to the presence of proteins. Gastrin stimulates the release of stomach acid, or hydrochloric acid (HCl) which aids in the digestion of the proteins. However, when the stomach is emptied, the acidic environment need not be maintained and a hormone called somatostatin stops the release of hydrochloric acid. This is controlled by a negative feedback mechanism.
In the duodenum, digestive secretions from the liver, pancreas, and gallbladder play an important role in digesting chyme during the intestinal phase. In order to neutralize the acidic chyme, a hormone called secretin stimulates the pancreas to produce alkaline bicarbonate solution and deliver it to the duodenum. Secretin acts in tandem with another hormone called cholecystokinin (CCK). Not only does CCK stimulate the pancreas to produce the requisite pancreatic juices, it also stimulates the gallbladder to release bile into the duodenum.
endocrine system