digestion Flashcards
1
Q
myenteric plexus
A
regulate contraction of smooth muscle
2
Q
submucosal plexus
A
regulate secretion into lumen of gi tract
3
Q
parasympathic ctrl
A
Ach stimulates muscle contraction
4
Q
sympathetic
A
relaxes muscle contraction via NA
5
Q
cephalic phase
A
Prepares for food
Controlled by extrinsic factors (sight, smell, taste of food)
Stimulated via vagus nerve
Secrete gastric juices into stomach
6
Q
gastric phase
A
Food enters stomach
Stretch, pH change => more secretion
Via. local nerves, gastrin (hormone), vagus stimulation
7
Q
intestinal
A
Chyme enters small intestine
Secretin (heightened pH) inhibits gastric juice secretion to allow for digestion
