GIT Physiology Flashcards
What leads to contraction
Acetyl choline
Where does ductile remodification occurs
Ducts
Reflux of food from stomach back to oesophagus
Chalasia
The accumulation of food in the oesophagus cause
Achalasia
Saliva consist of
Potassium and bicarbonate
Hormone of the pancreas
Glucagon
Insulin
Somatotropin
Pancreatic polypeptide
Junction between the stomach and small intestine
Pyloric junction
Presence of microvilli aid
Digestion
Enzymes involved in protein digestion are
Proteolytic enzymes
Example of amylolytic enzymes
Salivary amylase and maltase
Salivary amylase act on starch converting it to ______&______
Maltose and dextrin
Which monosaccharides molecules is absorbed fast
Galactose
The movement of glucose and galactose from lumen to small intestine is aided by
Sodium co transport using carrier protein
The uptake or absorbtion of fructose is aided by
Facilitated diffusion
__________is the basic functional unit of the liver
Hepatic lobule
Blood supply to the liver is by _______&_______
Hepatic portal vein and hepatic artery
The flow of blood from the intestine to the liver through the portal vein is
Enterohepatic circulation
The hepatic portal triad consist of
A branch of hepatic artery
A branch of hepatic portal vein
Tributary of bile duct
_________are bile transporting channel
Cannaliculi
Which plasma protein is not produced in the liver
Gamma globulin
_________is a lipolytic enzymes that hydrolise the triglycerides in milk fat into fatty acid and diacylglyceride
Lingual lipase
Deficiency of pancreatic lipase lead to
Steatorrhea ( excretion of undigested fat)
_________aid in emulsification of fat
Bile
The high surface tension of fatty acid makes them
Insoluble in water
Bile salt form complexes called
Micelle
Bile salt are absorbed in the
Illeum
Chylomicrons enter the blood stream through the
Thoracic duct in the neck
Fat soluble vitamin are
Vitamin A D E K
After absorbtion of iron into the blood iron combine with a protein to form
Apotransferin to form transferin
Transferrin is stored in the liver as
Ferritin
_________allows low resistance movement of ions from one muscle cell to the next
Gap junction
Which cells act as electrical pace maker for smooth muscle
Interstitial cells of cajal
The contraction of smooth muscle occurs with —-
Entry of calcium ion into the muscle fiber
Muscle of the GIT exhibit
Toniv contraction
3 main gland for salivary secretion
Parotid
Sublingual
Submaxillary
_________stimulate gastric hydrochloric acid secretion
Histamine
Secretion from the pancreas and liver joins together at
Ampulla of vater
Parietal or oxyntic cell secrete
Hydrochloric acid and intrinsic factor
Peptic or chief cells secrete
Pepsinogen
Mucous neck cells secrete
Mucus
Lack of the secretion of intrinsic factor causes
Achlorhydria (lack of stomach acid secretion)
Pernicious anemia (failure of maturation of red blood cells )
The exchange of hydrogen ion for pottasium ion in the canaliculus is catalysed by
H+K+ atpase
Function of mucus
Lubricate food movement
Protect the stomach wall from digestion by the gastric enzymes
Function of mucus
Lubricate food movement
Protect the stomach wall from digestion by the gastric enzymes
___________cells secrete histamine
Enterochromaffin like cells