Chapter 52 Flashcards
What is the Alimentary canal
The mouth pharynx esophagus stomach small intestine large intestine in the rectum.
Structure of inner wall
There are four layers and closer submucosa muscularis and serosa the mucosa is there animals layer
Function of the GI tract
Secretion digestion absorption motility and illumination
Saliva
Saliva is secreted in response to the presence of food in the mouth and begin to soften the food.
saliva contains making an enzyme called the Library Emilys also known as Ptyalin which begins the breakdown of carbohydrates
Stomach location
The stomach is located midline and the left upper quadrant of the dominant and has or anatomical regions.
Four regions of the stomach
The cardia upper portion near GE.
The fund us.
The main area of the stomach is the body of corpus.
The entrance or pylorus is the distal lower the portion of the stomach and separate it from the duodenum by the plyoric at Spencer
The pancreas function and structure
The pancreas is a fish shaped gland that lies behind the stomach and extends horizontally from the duodrnal C loop to the spleen .
exocrine and endocrine functions did the hormones are a essential in the regulation of metabolism.
A dual or in the head of the pancreas lies in the curvature of the duodenum
Pancreas exocrine enzymes
Trypsin digest proteins and Chymotrypsin
Amylase digest carbohydrates
Lipase digestion of fats
The Liver Structure and location
Largest GI organ. In Upper right quadrant mostly
Liver Function
Performs more than 400 functions in storage protection and metabolism and stores minerals vitamins such as iron magnesium fat vitamins A D E K
Ileocecal valve
Separates the entrance of the ileum from the cecum of the large intestines
Large intestines
I’m about 5 to 6 feet in length. starts with the cecum and ends with the anal canal
Function of the large intestines
Movement absorption and illumination consist of segmental contractions.
water is absorbed and electrolytes
food is stored in to in the rectum
Small intestine function
With me digestion and absorption it takes 3 to 10 hours for the contents to be passed by Peristalsis
Age related changes by a trophy of Cass Technical so decrease hydrochloric acid levels
This is called Hypochlorhydia.
A decrease absorption of iron and vitamin B 12 A. Moore bacteria. Atrophic gastritis occurs as a consequence of bacteria overgrowth.
Age related changes of decreasedperistalsis and the nerve impulses?
A decreased sensation to defecate leading to constipation
Age related changes of the older adult, distention and dilation of the pancreatic duct change. decrease in lipase production cause calcification.
A decrease in Lipase level results in decreased fat absorption and digestion steatorrhea or excess fat in the feces occurs because of decreased fat digestion
Age related changes in the number size of heptic cells. decreased liver weight and mass.
Decreased enzyme activity depresses drug metabolism which leads to accumulation of drugs possibly to toxic levels.