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27 Cards in this Set

  • Front
  • Back
Where is the pancreas located?
Under the stomach and near the duodenum.
What 2 distint parts constitute the pancreas?
1. Exocrine (98%)
2. Endocrine (2%) secretes Glucagon/insulin
What is pancreatic juice carried by?
The common bile duct, squirted into the duodenum along with bile from the liver.
So what are pancreatic secretions made up of?
Pancreatic exocrine secretions + bile salts
What 4 things is Pancreatic juice made up of?
1. Bicarb to neutralize acid
2. Proteases
3. Pancreatic amylase
4. Pancreatic lipase
What is significant about Pancreatic lipase?
It has the most important lipolytic effect; bile salts aid in fat emulsification and increase the SA for lipase to act on fat.
What controls the regulation of pancreatic secretions?
-Autonomic and Enteric NSs - in all of the digestive phases.
-Hormones - only in the intestinal phase.
What happens to pancreatic secretions during the cephalic and gastric phases?
Some increase in pancreatic secretions.
What happens to pancreatic secretions during the intestinal phase?
A large increase in pancreatic secretions!! In response to food being in the duodenum.
How is motility in the Small intestine categorized?
According to the state - whether it's absorptive or postabsorptive.
What type of motility occurs in the small intestine during the absorptive state?
1. Segmentation (mixing)
2. Peristalsis
What type of motility occurs in the small intestine during the post absorptive state?
Migrating Motor Complex.
How does the Migrating motor complex work?
1. Starts in Antrum of stomach.
2. Spreads to ileum.
3. A propagating wave of contraction (how beautiful)
What are the 3 feautures of this propagating wave?
1. Strong
2. Slow moving
3. takes 90 min from the antrum to the ileum.
What is the FUNCTION of the migrating motor complex?
It's the HOUSEKEEPER - removes undigested debris and prevents bacterial growth in the small intestine.
What are the 3 secretions in the small intestine?
1. Bicarb
2. Mucus
3. Bacteria
What do normal flora do in the small intestine?
1. Feed on undgstd carbs/beans
2. Produce gas: Co2, CH3
3. Produce toxins
what is the leading cause of death in children?
Death from dehydration due to diarrhea caused by increased bacterial secretion.
Structurally how is the large intestine composed?
In Haustrations.
How do Haustrations compare to Segmentations?
-Both cause Mixing movements
-30 minutes between flipping between segments in haustrns
-5 seconds between flipping in segmentations!
So how is mixing different between the large and small intestines, time-wise?
Segmentations = fast mixing

Haustrations = slow mixing
What are the 2 types of movements in the lg intestine?
1. Mixing from haustrations
2. Peristalsis from power propulsion.
How many times per day does Power propulsion occur?
3 or 4.
What does Power propulsion do?
Moves feces along the large intestine.
What stimulates the Power propulsion?
Gastrocolic reflex.
What is the Gastrocolic reflex?
1. Food in stomach
2. Power propulsion stimulated
3. Feces moves along
4. Feces in rectum
5. Stimulates defecation
What hormone controls power propulsion?
GASTRIN - stimulatory