Lecture 17: Digestive System 3 Flashcards
what’s the third part of the ANS?
Enteric nervous system
which part of the ENS is found in the wall of the GI tract?
submucosal plexus
myenteric plexus
what are the input sensory receptors are located in the GI tract ?
chemoreceptors and mechanoreceptors
what is the output ?
Effector cells (smooth muscle, exocrine and endocrine cells of GI system)
what is the cephalic phase of gastrointestinal control?
Stimuli originate in head
what is gastric phase of gastrointestinal control?
Stimuli Originate in stomach
what is intestinal phase of gastrointestinal control?
Stimuli Originate in stomach
what is the cephalic phase initiated by in gastric secretion ?
sight/smell/taste of food
what is the cephalic phase require input by in gastric secretion?
CNS
How does the cephalic phase affect secretion in gastric secretion?
Increased secretion of gastric juice
Gastrin secretion
what pathways are in the gastric phase in gastric secretion?
Short- and long-loop reflex pathways
what does the gastric phase activate in gastric secretion?
chemo- and mechano-receptors in the stomach wall
what does the gastric phase secretein gastric secretion?
Gastrin secretion
what does the intestinal phase activate in gastric secretion?
chemo- and mechano-receptors in the wall of duodenum/jejunum
what does the intestinal phase secrete in gastric secretion?
Secretion of hormones (Secretin, CCK, GIP) that inhibit gastric secretion
