chyme production; pushed through pyloric canal into small intestine
What are the two functions of gastric smooth muscle contraction?
a
The _________ shows low frequency contractions that create a basal tone.
a)upper stomach
b) lower stomach
b
The ________ shows high frequency peristaltic contractions.
a) upper stomach
b) lower stomach
gastric distention
_________ strongly stimulates peristaltic waves of contraction, accelerating liquefaction, resulting in gastric emptying.
neural; hormonal
Gastric motility is controlled by a very complex set of : ______ & _______ signals.
relax the proximal stomach; enhance contractions in distal stomach
How do Gastrin & Choleycystokinin affect gastric motility?
mixing contents w enzyems, increasing surface area, propulsion into large intestine
What are 3 functions that motility of small intestines serves?
segmentation
-contractions that chop, mix, and roll the chyme
peristalsis
-a ring of muscle contraction that slowly propels chyme toward the large intestine
c
Segmentation usually occurs in the _______.
a) stomach
b) large intestine
c) small intestine
d) liver
segmentation, antiperistaltic, mass movements
What are the 3 methods of large intestine motility?
haustration
-a mixing, modified segmentation movement
haustra
-bulge -sac like appearance of large intestine
anti-peristalsis
-propagate bolus toward the ileum; allows additional opportunity for absorption of water and electrolytes.
cranially
Anti-peristalsis moves large intestinal contents ________.
b
Mass movements are ONLY found in the _________.
a) stomach
b) large intestine
c) small intestine
d) liver
mass movement
-a very intense and prolonged peristaltic contraction which strips an area clear of contents.
dormant; extremely active
The colon is _______ between meals and __________ after meals
duodenocolic reflexes
-reflexes stimulated exclusively by the presence of fat in the proximal small intestine
gastrocolic reflex
-serves as a stimulus for defecation
d
Which organ is responsible for producing bile and filtering toxins and waste including drugs, alcohol, and poisons?
a) stomach
b) large intestine
c) small intestine
d) liver
gall bladder
-stores bile from liver
-fatty diets can cause gallstones to form here
fats
Bile helps digest ________.
c
Gall bladder releases bile into the _______
a) stomach
b) large intestine
c) small intestine
d) liver