General Info
Which cells in the stomach produce HCl (hydrochloric acid)?
parietal cells
Which cell in what organ produces pepsin (pepsinogen)?
Chief cells in the stomach
List structures in the small intestine that increase surface area for absorption.
plicae circularis
villi
microvilli
What organ are acinar cells that produce digestive enzymes a part of?
pancreas
Is the pancreas part of the digestive tract or an accessory organ?
accessory organ
What do duct cells of the pancreas produce?
sodium bicarbonate
What is absorption?
Movement of a nutrient from the digestive tract into the blood
What two secretions do parietal cells produce?
HCl and intrinsic factor
Which layers of the digestive tract wall contain nerve plexuses?
submucosa and muscularis externa
What organ signals to the pancreas using the hormones CCK and secretin?
the duodenum (first part of the small intestine)
What is the outermost layer of the wall of an organ of the digestive tract called?
the serosa
What is the function of the gall bladder?
stores and concentrates bile (which helps digest fats)
In the process of digesting carbs, digestion in the lumen of the small intestine is accomplished by ___________ and the final steps in the breakdown are accomplished by _______________.
pancreatic amylase, brush border enzymes
List the parts of a liver triad.
branch of hepatic artery
branch of hepatic portal vein
branch of the bile duct
lymph vessel
What nerve plexuses are a part of the enteric nervous system?
submucosal nerve plexus
myenteric nerve plexus
List the steps in fat digestion.
lingual lipase, gastric lipase, emulsification with bile, pancreatic lipase, micelles, diffusion into epithelial cell, chylomicron, into lymph vessel
List the three parts of the mucosa.
Epithelium (mucous membrane)
lamina propria
muscularis mucosa
What is the middle part of the small intestine called?
jejunum
What is the sphincter between the stomach and the duodenum called?
pyloric sphincter
Where does almost all chemical digestion and absorption occur?
small intestine