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____ is the physiological process that moves a nutrient from the outside to the inside of the body
The serous membranes that suspend the stomach and intestines from the abdominal wall are called
Each of the following lists some of the tissue layers of the digestive tract. Which one has them in the correct order from lumen to external surface?
lamina propia, muscularis mucosae, subucosa, muscularis externa, serosa
The surface of the tongue is covered with ____ stratified squamous epithelium and has bumps called ______ site of taste buds
nonkeratinized; lingual papillae
The ______ gland is an extrinsic salivary gland, whereas the ______ gland is an intrinsic salivary gland
The buccal phase of swallowing is under ______ control and the pharyngo-esophageal phase is _______.
central nervous system; controlled by autonomicreflexes
Acid reflux into the esophagus(heartburn) is normally prevented by
the lower esophageal sphincter (LES)
______, which is secreted by ______ cells, is necessary for Vitamin B12 absorption
intrinsic factor; parietal
Pepsinogen is produced by ______ and is activated by ______
chief cells; hydrochloric acid (HCI) secreted by parietal cells
Why are several digestive enzymes secreted as zymogens
so they act only in the stomach lumen and do not digest intracellular proteins
The enterogastric reflex serves to
inhibit gastric motility when there is chyme in the small intestine
_____ is associated with food stretching the stomach and activating myenteric and vagovagal reflexes, which in turn stimulate gastric secretions
the gastric phase
A hepatic (portal) triad consists of
bile ductule, branch of the hepatic artery and branch of hepatic portal vein
The small intestine has a very large absorptive surface associated with all these structures except
The _____ of the small intestine is/are similar to the ______ of the stomach
intestional crypts; gastric pits
The sodium-glucose transport protein(SGLP)
transports glucose and sodium from the intestinal lumen into the epithelial cells
Amino acids and monosaccharides are absorbed in the _____ and fatty acids are absorbed in the ______
small intestine; small intestine too
Proteins are digested by different enzymes acting in the following sequence
pepsin, trypsin, carboxypeptidase, dipeptidase
_____ transport lipids to the surface of the intestinal absorptive cells, which process them into ______
The muscle tone of the _____ along the colon contracts it lengthwise, causing its walls to bulge and form pouches called ______.
taeniae coli; haustra
Bacterial flora carry out all of the following except
digest most of the proteins we get in the diet
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