Digestive System Flashcards
The body of the esophagus lies within the thoracic cavity which is _____ pressured relative to the environment. The abdominal cavity vas a relative _____ pressure therefore the gradients favour ?
Negatively
Positively
Continual reflux of gastric materials into the esophagus
Food that has been sufficiently moistened and broken down to be swallowed down the esophagus
Bolus
The walls of the stomach have a mucous membrane containing ____ glands and have ___ cells in gastric pits
Gastric
Mucous
Chief cells synthesize ?
Parietal cells synthesize ?
Pepsinogen which is converted to pepsin when in contact with stomach acid
HCl and intrinsic factor
The churning of the stomach produces an acidic semi fluid mixture of partially digested food known as ?
Chyme
3 sections of the small intestine ?
Ileum
Jejunum
Duodenum
2 nutrients actively absorbed in the small intestine ?
Glucose and amino acids
3 things the intestinal mucosa secretes and what do they do?
Lipases: fat digestion
Aminopeptidases: polypeptide digestion
Disaccharides : for sucrose maltose and lactose digestion
Produced in the g cells of the duodenum , stimulates histamine and Pepsinogen secretion and gastric blood flow
Gastrin
Synthesized and stored in s cells. Stimulates bicarbonate production from the pancreas and inhibits gastric emptying and gastric acid production.
Secretin
Bile is produced where ? Stored? Acts where ?
Liver
Gallbladder
Small intestine
Functions of this include storage of glycogen, conversion of ammonia to urea, protein synthesis , detoxification and cholesterol metabolism
Liver
What enzymes are produced by the pancreas (3) and what do they do ?
Amylase : carbohydrate digestion
Trypsin: protein digestion
Lipase: fat digestion
What cleaves trypsinogen to trypsin
Enterokinase
