ANAT1053 Lecture Notes - Gastric Pits, Gastric Glands, Parietal Cell

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peterliban

12 Jun 2022

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Rugae internal folds of the mucosa present when the stomach is empty. Delivers chyme (processed food) to the small intestine. Simple columnar epithelium dotted by gastric pits that lead to gastric glands. Intrinsic factor, which is needed for vitamin b12 absorption in the small intestine. Gastric glands situated in gastric pits and secrete gastric juice, including: Mucous neck cells produce thin acidic mucus (different from the mucus produced by cells. Enteroendocrine cells produce a hormone called gastrin hydrochloric acid. Chemical digestion most occurs in small intestine: enzymes are produced by, intestinal cells, pancreas, pancreatic ducts carry enzymes to the duodenum, bile, formed by the liver, enters the duodenum via the bile duct appearance) Goblet cells produce alkaline mucus to lubricate the passage of feces. Muscularis externa layer is reduced to three bands of muscle called teniae coli. These bands of muscle cause the wall to pucker into haustra (pocketlike sacs) Major functions of the digestive system are summarized as:

Related Questions

1. Where does most chemical breakdown of carbohydrates occur? A. The stomach B. The small intestine C. The large intestine D. The mouth

2. The pancreas produces

	A.	bicarbonate and enzymes.
	B.	bile and enzymes.
	C.	bicarbonate and bile.
	D.	pepsin and bile.

3. Bile participates in the digestion of ______. Its specific function is to ______.

	A.	proteins . . . break down proteins into short polypeptides
	B.	fats . . . emulsify fats
	C.	fats . . . break down fats into glycerol and fatty acids
	D.	starch . . . break down starch into maltose

4. After chemical breakdown in the small intestine, nutrients are absorbed across the intestinal wall. Where do the nutrients go from there?

	A.	Fats go into the bloodstream to the liver. Water soluble nutrients go into the lymphatic system.
	B.	All nutrients go into the bloodstream to the liver.
	C.	All nutrients go into the lymphatic system.
	D.	Water soluble nutrients go into the bloodstream to the liver. Fats go into the lymphatic system.

5. The enzyme pepsin is found in the ________ and functions to _______________.

	A.	small intestine . . . break down carbohydrates
	B.	stomach . . . partially break down proteins
	C.	mouth . . . partially break down proteins
	D.	stomach . . . break down carbohydrates

6. The major function of the colon in digestion is to

	A.	produce bile.
	B.	break down fats.
	C.	absorb most nutrients.
	D.	reclaim water.

bronzesnail770

As we transition between the upper and lower components of thedigestive system, let's start out by talking what changes mustoccur at the transition between the stomach and small intestines tofurther the digestive process.

Each of you should focus on the substances secretedat this transition that either neutralizes the chyme from thestomach or takes up where the stomach has left off in terms ofchemical digestion (look to proteins, carbohydrates andlipids)

beigewasp862

How do animals keep protein digesting enzymes which function indigestive system from destroying the cells that make them in thestomach as well as in the small intestine?

ANAT1053 Lecture Notes - Gastric Pits, Gastric Glands, Parietal Cell

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