1. what protection from stomach acid does the stomach have that the esophagus la

Question

1. what protection from stomach acid does the stomach have that the esophagus lacks?

a. keratinized, stratified squamous epithelium

b. ample lymphatic tissue

c. a mucous membrane

d. mucus cells that make alkaline mucus

e. hair and natural flora

f. all of the above

g. none of the above

2 . Why does the duodenal region of the small intestine have so many Brunner’s glands (duodenal glands)?

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3. There is a large collection of lymph tissue (Peyer’s patches) in the ileum region that battles bacterial

infiltration. Why is there likely to be bacteria here, in the ileum specifically, versus the jejunum?

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Explanation / Answer

Qno1.D

Stomach is protected by epithelial cells which produce and secrete a bicarbonate rich solution that coats the mucosa and this neutralize the stomach acid .esophagus lacks this .

2. Duodenal glands of small intestines have so many brunner's gland because

1.to protect the duodenum from acidic content of chyme the partially digested food mixed with HCl .

2.It provides alkaline medium for intestinal enzymes to get activated and thereby enabling absorption ..

3.It moistens or lubricates walls of intestines .

Qno3.The ileum is the last section of small intestines. The pH of ileum lies between 7 to 8.Most of absorption takes place in ileum .The microflora of ileum resemble to those of colon .It is because of decreased peristalsis, acidity and lower oxidation reduction potential the ileum maintains higher bacterial population and it may be also due to colon backwash. Colon is full of bacteria and ileum is connected with colon.

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