Situated between the circular muscle layer and the longitudinal muscle layer in the lower esophagus, stomach, and intestines, the major nerve supply to the gastrointestinal tract that controls GI tract motility is the:
1. myenteric plexus
2. muscularis
3. submucosal plexus
4. serosa

What is true about the Peyer's patches in the intestinal wall?

1. They are lymphoid nodules located in the ileum

2. They are lymph nodes located in the duodenum

3. They protect the large intestine from bacteria in the small intestine, which might pass through the ileocecal valve

4. They are lymphoid nodules located in the ileum and protect the large intestine from bacteria in the small intestine, which might pass through the ileocecal valve

Assertion: The microvilli of small intestinal epithelium are important for the final step of digestion of carbohydrates especially.
Reason: The microvilli that constitute the brush border have enzymes for this final part of digestion anchored into their apical plasma membrane as integral membrane proteins.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion.
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but reason is false.
4. Both assertion and reason are false.

The mucosa associated lymphatic tissue that is most commonly the site of inflammation is:
1. Peyer's patches
2. palatine tonsils
3. lingual tonsils
4. adenoids

Myenteric and meisener’s plexus regulate the functions of the gut in response to changes in:
1. External stimuli
2.Local Environment
3. Central nervous system activation
4. Hormone concentrations