Digestive System Flashcards
What is the role of the Enteric Nervous System?
regulates motility, secretion, blood flow
Where is the enteric nervous system found?
esophagus through the intestines
What are the 2 plexuses of the enteric system?
- submucosal
- myenteric
What 2 processes does the submucosal plexus control?
- secretions from mucosa glands
- movements of muscularis externa
The submucosal plexus is found in which layer of the alimentary canal?
submucosa
Where is the myenteric plexus found?
b/w layers of muscularis externa
What is the role of the myenteric plexus?
controls contractions of muscularis externa
Myenteric plexus contains _______ ganglia.
parasympathetic
Myenteric reflexes are _______ reflexes.
short
The stretch or chemical stimulation of myenteric plexus.
myenteric reflexes
Vagovagal reflexes are ______ reflexes.
long
Vagovagal reflexes are triggered by ______.
parasympathetic stimulation of digestive tract
What do the vagovagal reflexes target?
myenteric nerve plexus and many other organs
What is the most numerous cell type of stomach?
chief cells
gastric lipase
breaks down fats
______ chemically digest proteins.
pepsin
Zymogen
inactive enzyme- activated by removal of AA
Gastric Juice
water, HCL, pepsinogen, gastric lipase, intrinsic factor
The stomach sends ______ to duodenum.
chyme
The liver/gallbladder send ______ to duodenum.
bile
The pancreas sends _______ to duodenum.
digestive enzymes
What is a bile salt/acid?
steroids synthesized from cholesterol
Role of Bile Salts
emulsify fats: aids in digestion and absorption
Bile: Liver
produces and secretes bile
