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Digestive Physiology Pt. 2

Terms in this set (60)

Motility in the small intestine is controlled by ____________________________ and ___________________ contractions to ensure that the small intestine is not overwhelmed by chyme.
segmental and peristaltic
Most of the absorbed nutrient from intestinal epithelium go to the ____________________________ for distribution but fats use ______________________________ to enter circulatory system.
circulatory system
lymphatic circulation
Stem cells in the ___________________ produce new epithelial cells to replace those that die or are damaged
crypts
Most absorption occurs along the ___________ while most fluid secretion occurs in the ____________________.
villi
crypts
Most nutrients absorbed by the intestine pass through the ____________________, which serves as a filter that can remove potentially harmful xenobiotics before they get into the systemic circulation
liver
What are the 5 intestinal secretions that promote digestion?
1. digestive enzymes
2. bile
3. bicarbonate secretion
4. mucus
5. isotonic NaCl secretion
The endocrine portion of the pancreas secretes _____________ and ________________.
insulin and glucagon
The ____________________ portion of the pancreas secretes digestive enzymes and sodium bicarbonate
exocrine
The enzyme secretion of the exocrine portion of the pancreas is located in the brush border and converts ____________________ to trypsin
trypsinogen
The _________________________ secretion of the pancreas neutralizes gastric acid
bicarbonate
_________________ cells secrete digestive enzymes
Acinar
____________________ cells secrete NaHCO3 that enters the digestive tract
Duct
_____________________ cells secrete hormones that enter the blood
islet
Bile is secreted by ________________
hepatocytes
What makes up the composition of bile?
bile salts, bile pigments, and cholesterol
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