336 Student Notebook for The Human Body: Concepts of Anatomy and Physiology Prop

Question

336 Student Notebook for The Human Body: Concepts of Anatomy and Physiology Propulsion of chyme through the small intestine is provided by The peristaltic waves continue then pause in a slow propulsion that takes 3 to 10 hours to move chyme through the small intestine. If the chyme is moved too quickly so that water, electrolytes, and nutrients cannot be normally absorbed, what condition results? 3. Propulsion Review Time! L. Provide a bricf ansnwer for each of the following questions about the small intestine. 1. What are the three segments of the small intestine? 2. 3. 2. What are the two modifications of the mucosa? Explain the functions of these two modifications. 3. Describe the function of the plicae circulares. 4. What are the two valves (sphincters) that enclose the small intestine at each end? s. How are the intestinal glands and Brunner glands functionally similar? Do these glands differ and if so, how 6. Name and briefly describe the three functions of the small intestine.-- 1. 2. 3. 7. Describe the role of pancreatic enzymes and bile in chemical digestion in the small intestine. 8. Where within the Gl tract does carbohydrate digestion begin? Where is carbohydrate digestion completed? 9. Where within the GI tract does protein digestion begin? Where is protein digestion completed? 10. What does peristalsis accomplish in the small intestine?

Explanation / Answer

1..three parts of small intestine: duodenum,jejunum,ileum

2.microvilli and circular fold.they helps in better absorption of nutrients.

3.They increases amount of surface area available for absorption of nutrients.

4.pyloric sphincter(stomach-small intestine) and ileocecal vale(small intestine-large intestine) this two are present.

5. brunners gland are found in portion of duodenum which are submucosal gland.they produces mucus rich alkaline secretion.intestinal gland also secrets digestive enzymes.

6.function of small intestine

-completes digestion of food

-receives secretion from pancreas and liver that aids in digestion

-lined microvilli and villi increases surface area and absorption of nutrients

7. pancreatic juice contains pancreatic enzyme called pancreatic amylase which is used for digestion of carbohydrates and also contains trypsin,carboxypeptidase,chymotrypsin which digest proteins.Bile contains bile acids which are critical for digestion an absorbtion of fat and fat soluble vitamins in small intestine

8.Carbohydrate digestion begins in mouth and completed in small intestine

9.protein digestion begins in stomach and completed in small intestine

10.During peristalsis,longitudinal muscles within small intestine wall contract and then circular muscle contracts.which pushes food downword.this cordinated contraction of muscle keep food moving on its one way path through digestive system.

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