Coming from the acid pH of the stomach which pH level does the chyme find when it enters the duodenum? Why is it necessary to maintain that pH level in the small intestine? What are the organs responsible for that pH level and how is it kept?
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- Coming from the acid pHof the stomach which pH leveldoes the chyme find when itenters the duodenum? Why isit necessary to maintain thatpH level in the small intestine?What are the organsresponsible for that pH leveland how is it kept?After digestion the nextstep is absorption done bycells of the mucous membraneof the intestine. For this task alarge absorption surface is anadvantage. How is it possiblein the small internal space ofthe body of a pluricellularorganism to present a largeintestinal surface?How would removal of 95% of the stomach (subtotal gastrec-tomy) to treat severe ulcers or cancer affect digestion andabsorption? How would the patients have to alter eating hab-its? Why? Do you think that people should have this type ofsurgery to treat life-threatening obesity?
- What would happen to gastrin secretion in a patient taking a drugthat blocks the binding of histamine to its receptor on the parietalcell?If the salivary glands were unable to secrete amylase, what effect wouldDoes this have an effect on starch digestion?What is the differencebetween a complete digestivesystem and an incompletedigestive system? How arethese types of digestive tubesassociated or not toextracellular digestion?
- Besides being fundamentalfor the activation of the maingastric digestive enzyme howdoes HCl also directlyparticipate in digestion?Describe the location(s) in the digestive tract whereeach of the major types of nutrients is broken down.Anatomically, the of the stomachmost closely resemble the of thesmall intestine.a. gastric pits, intestinal cryptsb. pyloric glands, intestinal cryptsc. rugae, aggregated lymphoid nodulesd. parietal cells, goblet cellse. gastric glands, duodenal glands
- What is the digestiveenzyme that acts within thestomach? Which type of fooddoes it digest? What are thecells that produce thatenzyme?What is the substanceproduced in the liver that actsin the small intestine duringdigestion? How does thatsubstance act in the digestiveprocess?A drug that reduces blood cholesterolhas the effect of stimulating the production of bile salts. Howmight this result in lower blood cholesterol? Hint: There aretwo ways.