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Week 13

Digestion and Absorption

QuestionAnswer
CCK is an intestinal hormone that causes the pancreas to increase secretion of exocrine high in enzymatic content, opposes the influence of gastrin on gastric parietal cells, and stimulates contraction of the gallbladder so that bile can pass into the duodenum.
The wave-like ripple of the muscle layer of the GI tract is called Peristalsis
What percentage of this blood flow comes from the hepatic portal system? 80%
The final step in lipid transport by the intestines is the formation of chylomicrons
The chemical process in which a compound unites with water and then splits into simpler compounds is called Hydrolysis
_____ is the passage of substances through the intestinal mucosa into the blood or lymph. Absorption
During which stage of swallowing is there a risk of food entering respiratory pathways? Oropharyngeal
Chemical digestion requires the secretion of _____ into the lumen of the GI tract. digestive enzymes and bile
Fats and other nutrients in the duodenum stimulate the intestinal mucosa to release a hormone called gastric inhibitory peptide
Because fats are insoluble in water, they must be Emulsified.
The process of deglutition includes all of the following except the _____ stage. laryngeal
Pepsinogen is converted to pepsin by hydrochloric acid, which is produced by the _____ of the gastric glands. parietal cells
The act of expelling feces is called Defecation.
Peristalsis is regulated in part by the intrinsic stretch reflexes. It is also thought to be stimulated by the hormone cholecystokinin (CCK)
The ejection of bile from the gallbladder is controlled by which hormones? CCK and secretin
Stimulation of gastric juice secretion occurs in all of the following phases except the _____ phase digestive
Saliva contains the enzyme Amylase
Created by: Sandoval.Sam
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