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Digestive Secretions

Secretions of the Digestion systems

QuestionAnswer
what are the three types of Exocrine secretory cells mucous, chief, and parietal
What are the three types of endocrine/paracrine secretory cells enterochromaffin-like cells (ECL), G cells, D cells
mucous cells secrete what product alkaline mucus
the chief cells secrete what pepsinogen
the parietal cells secrete what hydrochloric acid and Intrinsic factor
the ECL cells secrete what histamine
the G cells secrete what gastrin
the D cells secrete what somatostatin
Mechanical stimulation, by content in the stomach, is a stimuli for what cell mucous cells- that will secret alkaline mucus to protect against mechanical, pepsin, and acid injury
ACh released from intrinsic nerve plexuses in response to short reflexes and vagal stimulation will stimulate what cells chief, parietal, ECL, and G-cells (probably will be easier to remember isn't a stimuli for mucous and D cells)
Gastrin will stimulate what cells to secrete its contents. It is also the main factor responsible for bringing about increased _____ secretion during digestion of a meal. chief, parietal, and ECL ( stimulates same cells as ACh except G cells since that is where they came from) increased HCl secreation
histamine will stimulate what cells to secrete parietal cells
Protein products in the stomach will stimulate what cells to secrete G cells
Acid content in the stomach will stimulate what cells in the stomach to secrete D cells (remeber you have more D cells in the small intestine)
Chief cells are stimulated by what two stimuli ACh and Gastrin ( Same as ECL cells just incase K-type)
Parietal cells are stimulated by what three stimuli ACh, Gastrin, and histamine. These three things working together cause a greater secretion of HCl than any of them does separately. Of the three histamine has the greatest stimulatory effect
ECL cells are stimulated by what two stimuli ACh and Gastrin ( Same as chief cells if K-type)
G cells are stimulated by what two stimuli protein products, and ACh
D cells are stimulated by what stimuli Acid
The function of Alkaline mucus by the mucous cells is what protect mucosa against mechanical, pepsin, and acid injury
The function of pepsinogen by the chief cells is to when activated, begins protein digestion
The function of HCL by parietal cells is to decrease stomach pH to activate pepsinogen to pepsin, break down connective tissue and muscle fibers, denature protein exposing peptide bonds for enzymatic attack, and assist lysozyme in the killing of micro-organisms
The functions of Intrinsic factor by the parietal cells is to facilitate absorption of vitamin B12
The Function of Histamine by the ECL cells is to (remember that it's from a endocrine cell, so it's a hormone. This will help you remember its function) stimulate parietal cells
The function of Gastrin by the G cells is to (remember it's from a Endocrine cell, so it's a Hormone. It will help you remember its function) stimulates parietal, chief, and ECL cells
The function of Somatostatin by the D cells is to (remember that it's from a endrocrine cell, so it's a hormone. This will help you remember its function) inhibit parietal, G and ECL cells
What fluid, hormone and/or Enzymes comes from the oral cavity secretions Saliva: water, electrolytes and proteins: lysozyme, salivary amylase, mucus
What fluid, hormone and/or Enzymes comes from the Esophagus secretions mucus
What fluid, hormone and/or Enzymes comes from the fundus and body of the stomach (oxyntic mucosa) mucus, HCl, pepsinogen, histamine, and intrinsic factor
What fluid and/or Enzymes come from the Antrum mucus, gastrin, little somatostatin and little pepsinogen
What fluid, hormone and/or Enzymes come from the Live Cholesterol and Bile: bile salt, billirubin, mucus (alkaline secretion)
What fluid, hormone and/or Enzymes comes from the pancreas scretions Trypsin, chymotrypsin, carboxypeptidase, pancreatic amylas, pancreatic lipase, riobonclease, deoxyribonuclease, cholesterol esterase, bicarbonate ions
What fluid, hormone and/or Enzymes comes from the small intestine secretions exocrine secrections:Succus entericus", Electrolytes and Water ~ Endocrine secrections (Hormones): Motilin, Secretin (duodenum), Cholecystokinin CCK (duodenum) Somatostatin (Duodenum) .
What fluid, hormone and/or Enzymes comes from small intestine brush boarder-hairlike projections on the plasma membrane epitelial cells of small intestine Enterokinase, Dissacharidase(sucrase, maltase, lactase) Aminopeptidase
Cholecystokinin functions included inh gastric empt and gastric secret, stim. digest enzy secr by pancreatic acinar cells, causes gallbladder contract and relax of the sphincter of Oddi, is trophic to ex. pancreas, cause long-term adaptive changes in the pancreatic enzy, hand in satiety
Secretin functions are inhibits gastric emptying and gastric secretion, stimulates NaHCO3 secretion by the pancreatic duct cells and by the liver, is trophic to the exocrine pancreas
Created by: Elaina Patterson Elaina Patterson on 2007-12-13



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