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mesentery of small intestine
holds many blood vessels; suspends small intestine from posterior body wall
mechanically breaks up food particles, liquifies the food and begins chemical digestion of protein and fat
-chief cell, protein digestion
-secreted as pepsinogen (an inactive zymogen)
-HCl converts it to pepsin (active form)
-pepsin then activates more pepsinogen
vagus nerve stimulates gastric secretion and motility just with sight, smell, taste or thought of food (psychological)
-yellow-green fluid containing minerals, bile acids, cholesterol, bile pigments and phospholipids
-between meals, it is concentrated by factor of 20
-1 micron tall
-brush border on cells
-brush border enzymes for final stages of digestion
-populations of lymphocytes to fight pathogens
-also known as collection of lymphatic tissue
prevents food from moving back into the small intestine once it has entered the large intestine
gastrin, which prods the stomach glands to produce more enzymes and HCl represents a ___
the fact that the mere thought of a relished food can make your mouth water is an example of ___
many people chew gum to increase saliva formation when their mouth is dry. This is an example of ___
since living cells of the stomach are largely protein, it is amazing that they are not digested by the activity of stomach enzymes. The most important means of stomach protection is the ___ it produces
the third layer of smooth muscle found in the stomach wall allows mixing and mechanical breakdown by ___
the small intestine is protected from the corrosive action of hydrochloric acid in chyme by ___, which is ducted in by the pancreas
the pancreas produces protein-digesting enzymes, amylase and nucleases. It is the only important source of ___
fructose, galactose, glucose
the building blocks of carbohydrates are monosaccharides, or simple sugars. The three common simple sugars in our diet are __, __, __
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