Motility

Question 1

Digestive period:
In stomach for _-_ hours
In SI for _-_ hrs
Empty the stomach/SI takes \_\_-\_\_ hrs
MMC is \_\_ hr per cycle
Must stay in LI for _-_ hrs but usually there for 42-52 hrs

Answer 1

Digestive period:
In stomach for 2-4 hours
In SI for 2-4 hrs
Empty the stomach/SI takes 10-18 hrs
MMC is 1.5 hr per cycle
Must stay in LI for 8-12 hrs but usually there for 42-52 hrs

Question 2

Infants lack ____ peristalsis reflex among other _____ reflexes.

Both infants and pregnant woman have low tone of _____ along with diminished reflex to contract ____ in response to pressure increases.

Answer 2

Infants lack SECONDARY peristalsis reflex among other ESOPHAGEAL reflexes.

Both infants and pregnant woman have low tone of LES along with diminished reflex to contract LES in response to pressure increases.

Question 3

Antral systole is causes by ____ pacmaker within the ____ of the stomach.

Answer 3

Antral systole is causes by CORPUS pacmaker within the BODY of the stomach.

Question 4

Duodenal gastric reflex occurs when _____ is sensed in duodenum, which causes increased _____ sphincter tone. This reflex also inhibits ______ ______ peristalsis

Answer 4

Duodenal gastric reflex occurs when DISTENTION is sensed in duodenum, which causes increased PYLORIC sphincter tone. This reflex also inhibits LOWER STOMACH peristalsis

Question 5

MMCs are regulated by _____ while digestive motilities are regulated by _____ and other hormones.

ECAs are modulated by _____ _____ but not initiated by them.

Answer 5

MMCs are regulated by MOTILIN while digestive motilities are regulated by GASTRIN and other hormones.

ECAs are modulated by motor neurons but not initiated by them.

Question 6

Modulation of ECAs by neuroendocrines:

Excitatory: _____ and _____
Inhibitory: ______ and ____

Answer 6

Modulation of ECAs by neuroendocrines:

Excitatory: ACH and GASTRIN
Inhibitory: NOREPI and NO

Question 7

Gastroileal reflex: entry of food into the empty stomach results in _____ of ileo-cecal _____ leading to _____ of ileum.

Gastrocolic reflex/Duodenocolic reflex: entry of food into empty stomach or chyme into duodenum—-> aboral ______ _____ into _____.

Colonocolonic reflex: _____ of one part of the colon leading to _____ of other parts.

Answer 7

Gastroileal reflex: entry of food into the empty stomach results in RELAXATION of ileo-cecal SPHINCTER leading to EMPTYING of ileum.

Gastrocolic reflex/Duodenocolic reflex: entry of food into empty stomach or chyme into duodenum—-> aboral PROPULSIVE MOVEMENT into COLON.

Colonocolonic reflex: DISTENTION of one part of the colon leading to RELAXATION of other parts.

Question 8

Duodenogastric reflex: duodenal ____ causes decreased gastric ______.

Ileogastric reflex: ileal ____ leads to decreased gastric _____.

Intestino-intestinal reflex: over-____ of a segment caused by ____ results in general _____ of intestinal _____ activity.

Colonic-intestinal reflex: ^^^^^Same

Peritoneo-intestinal reflex: handling of the intestine during ______ results in same as previous 2.

Answer 8

Duodenogastric reflex: duodenal DISTENTION causes decreased gastric EMPTYING.

Ileogastric reflex: ileal DISTENTION leads to decreased gastric EMPTYING.

Intestino-intestinal reflex: over-DISTENTION of a segment caused by OBSTRUCTION results in general INHIBITION of intestinal MUSCLE activity.

Colonic-intestinal reflex: ^^^^^Same

Peritoneo-intestinal reflex: handling of the intestine during SURGERY results in same as previous 2.