BIO 263 Lecture Notes - Lecture 8: Cecum, Omeprazole, G Cell

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silverdonkey766

18 Jun 2018

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Digestive System

Abdominal Quadrants

Digestive Organs to Know: stomach, small intestine, cecum, appendix, colon (large intestine)

Lumen: the open space in the

digestive tract

Mouth: has stratified squamous to

protect from food (mucosa layer)

Enhancing surface area

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Document Summary

Digestive organs to know: stomach, small intestine, cecum, appendix, colon (large intestine) Lumen: the open space in the digestive tract. Mouth: has stratified squamous to protect from food (mucosa layer) Peristalsis describes the waves of contracting muscularis smooth muscle to move food down the digestive tract. Segmentation is an entirely different pattern of muscle contraction. Coordinating all the muscle requires ~500,000,000 neurons (more than in brain of a squirrel) Stomach makes hydrofluoric acid which mixes with food in digestion. G cells secrete a hormone (gastrin) that stimulates parietal cells. Nexium, prevacid, prilosec all block acid pumps. Rectum & anal canal - end of digestive tract. Food enters cecum and moves through large intestine, absorbs water. Diarrhea due to not absorbing water (i. e. cholera) thus dehydration. Upper stomach is divided- new pouch is formed about the size of a golf ball. Pouch is attached to the jejunum ( jejunum is also divided) via roux limb.

Related Questions

The GI tract is composed of many organs and structures that store, digest, move and expel food. Each segment has a specific function with the purpose of providing nutrients to the body. In order to perform these functions, structural modifications have been made to the digestive system. Identify at least two organs in the digestive system which have been modified â identify the organ, the modification and the function performed. What do you think the impact on digestion and the body would be if either the stomach, small intestine or large intestine had to be fully or partially removed?

The GI track is composed of many organs and structures that store, digest, move and expel food. Each segment has a specific functions, structural modifications have been made to the digestive system. Identify at least two organs in the digestive system which have been modified- identify the organ, the modification and the function performed. What do you think the impact on digestion and the body would be if either the stomach. small intestine or large intestine had to be fully or partially removed?

5. Fats A. Chemical digestion of lipids occurs primarily in the small intestine. Before enzymes can break down fats like triglycerides (the most common type of fat in our foods), they must undergo emulsification. Describe the process of emulsification. Name the substance which performs this job. Name the organ that synthesizes this substance. Name the organ which stores and concentrates this substance. How does this substance get into the duodenum of the small intestine? B. After fats are emulsified, they are chemically digested. What is the general name for enzymes which digest fats? Name all of the organs which synthesize and secrete this enzyme into the digestive tract. C. Cholesterol is a type of fat. Why is it important to have some cholesterol in our diets? Why is it important not to have too much cholesterol in our diets?

6. Waste Production A. The large intestine AKA colon is the digestive organ which produces feces. Starting with the cecum and ending with the anus, name ALL parts of the large intestine in order. B. How does the large intestine convert liquid waste from the small intestine into solid waste to be eliminated from the body? C. Name 5 components of fecal matter. NOTE that the small intestine absorbs ALL of the digestible carbohydrates, proteins, and fats in our diets; thus, these nutrients must NOT be in your list.

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BIO 263 Lecture Notes - Lecture 8: Cecum, Omeprazole, G Cell

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