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Lab Motility – Interactive Physiology Worksheet

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1. The process by which food is received into the GI tract via the mouth is called _______________.
2. The esophagus is digestive in function. ______________.
3. Swallowing has both voluntary and involuntary components. ____________.
4. The function of the epiglottis is to prevent a bolus from entering the ______________________.
5. The first wave of contraction of the esophageal muscles is called ___________ ______________.
6. If a food bolus does not make it all the way to the stomach, _____________________ peristalsis
forces the bolus the remainder of the way.
7. Peristaltic contractions of the stomach occur about ___________ times per minute when food
makes it into the body and fundus.
8. The frequency of peristaltic contractions is regulated by ____________________________ cells.
9. Gastric emptying would be slowed by which of the following?
10. ______________ regulate gastric juice secretion during the cephalic phase.

11.The cephalic phase of digestion is regulated by short reflexes. ___________.
12. The ____________________ nerve carries electrical signals from the brain to the stomach.
13. The hormone ________________________________ regulates gastric secretion during the
gastric phase of digestion.
Page 1 of 4 BIO1014 Anatomy and Physiology II Lab © 2013 South University
14. Gastric motility ______________________________ as the stomach begins to receive food.
15. The hormone ______________________________ released by the duodenum causes gastric
motility to decrease when fats are present in the duodenum.
16. The hormone __________________________ causes the gallbladder to contract and release bile
into the small intestine.
17. The ________________________________________ reflex describes the communication
between the intestine and the stomach.
18. Sympathetic nervous system stimulation ______________________ digestive system activity.
19. The motility process illustrated below is ____________________________________.
20. Segmentation moves chyme in only one direction. __________.
21. The frequency of segmentation contractions is greatest in the __________________________.
22. ______________________________ reflexes stimulate the ileum to increase activity when food
is in the stomach.
23. The hormone _______________ causes the ileocecal sphincter to relax during the gastric phase.
24. During the interdigestive period, ____________ _________________ _____________ occur
about once every 90 minutes to move undigested materials toward the terminal ileum.
25. Migrating motility complexes are controlled by the central nervous system. ___________.

Page 2 of 4 BIO1014 Anatomy and Physiology II Lab © 2013 South University
26.List the two major functions of the large intestine:
1. ___________________________________________________________________
2. ___________________________________________________________________
27. Pockets formed by the contractions of the transverse and descending colon musculature are
called __________________.
28. Sustained, intense propulsive peristaltic contractions of the large intestine are called
_____________ _____________.
29. Which of the following is under voluntary control? ____________________________________.
30. Only about __________ ml of the 500 ml of chyme that entered the colon is voided as feces.
31. Place the following labels on the large intestine figure below:
cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum, haustra,
32. The _______________________________ reflex stimulates mass movements of the colon.
Page 3 of 4 BIO1014 Anatomy and Physiology II Lab © 2013 South University
33. List three emotions or sensations that may produce constipation.
1. ______________________________________________________________________
2. ______________________________________________________________________
3. ______________________________________________________________________
34. The vomiting reflex is coordinated in the ___________________ ____________________.
35. Which of the following is not typically a stimulus for the vomiting reflex?

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