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WHS GI Tract 3
small intestine and lg. intestine
35
Physiology
12th Grade
11/04/2010

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Cards

Term
18 ft. long; 5-6 meters
Definition
About how big is the small intestine?
Term
duodenum
Definition
What is the first section of the small intestine?
Term
jejunum
Definition
What's the middle section of S.I. called?
Term
ileum
Definition
What part of the s.i. is attached to the lg. intestine?
Term
bile and pancreatic juice
Definition
What secretions are ducted into the s.i. from accessory organs?
Term
pyloric sphincter
Definition
What is the muscle between the stomach and s.i. that helps control the flow of chyme to the s.i.?
Term
chemical digestion and absorption
Definition
What two digestion processes are the s.i.'s specialty?
Term
mesentery
Definition
What's the connective tissue that binds the s.i. together?
Term
the fingerlike projections called villi
Definition
What makes the s.i. velvety to the touch?
Term
The inner lining is folded and then there are villi projections on that, which have their own microvilli projections on top of them.
Definition
How does the s.i. get such a large absorptive surface?
Term
They are transported through the microvilli cells into the inside of a villus where they are then absorbed by the capillary network inside the villus.
Definition
How are monosaccharides (simple sugars) absorbed in to the blood?
Term
They are transported into the microvilli cells and then processed by the cell. They have a protein coat formed around them and then they are sent into the lacteal on the inside of the villus. The lacteal merges with lymph vessels which will eventually carry the fatty acids to the blood.
Definition
How are fatty acids absorbed?
Term
lacteals
Definition
What is located inside villi that transports fatty acids to the lymphatic system?
Term
a.a. are transported through the microvilli cells to the capillaries inside the villus.
Definition
How do amino acids get absorbed?
Term
the microvilli cells
Definition
what secretes the digestive enzymes in the s.i.?
Term
peptidases (protein), sucrase/ amylase (carbohydrates), lipases (lipids)
Definition
What type of digestive enzymes are made inside the s.i.?
Term
2 gallons
Definition
About how much dig. juices are made each day by the s.i.?
Term
the presence of chyme in a part of the s.i. stimulates that part to make secretions
Definition
What stimulates the s.i. to make secretions?
Term
hypothalamus and parasympathetic
Definition
What part of the nervous system regulates the release of dig. secretions?
Term
cecum, ascending, transvers, descending, sigmoid, rectum
Definition
What are the different sections of the lg. intestine?
Term
water and electrolytes/ salts
Definition
What absorption is done in the L.I.?
Term
little to none;
bacteria are doing digestion there
Definition
What digestion is done in the l.i.?
Term
They help us get a few more nutrients from our food; the harmless bacteria out compete the disease causing bacteria that want in us.
Definition
What are the benefits of having bacteria housed in our colon?
Term
bacteria create gas when they are digesting our waste.
Definition
What creates the gas in the colon?
Term
bacteria, mucus, food waste (cellulose), blood and bile pigments
Definition
What's in poop?
Term
once every couple days
Definition
How often should you poop?
Term
Light brown, long pieces, less dense, once a day bowel movement
Definition
What are the characteristics of a healthy poop?
Term
mucus from globlet cells
Definition
What's the only secretion the l.i. makes?
Term
binds waste together, protects the lining, helps neutralize acid made by bacteria
Definition
What does mucus do in the L.I.?
Term
they are "mass" movements that only happen 2-3 times a day. Movements usually follow a meal.
Definition
How are peristaltic waves in the l.i. different from the waves in the s.i.?
Term
hemmorrhoids
Definition
Enlarged, inflamed branches of the rectal vein in the anal canal
Term
Not sure; it might have an immune function.
Definition
What does the appendix do?
Term
cecum
Definition
What is the pouch that connects the s.i. to the l.i.?
Term
both; you have two sphincters.
Definition
Is the anus under voluntary or involuntary control?
Term
those rich in sulfur like beans, broccoli, bran cabbage, onions etc.
Definition
If you've got a hot date, which foods should you avoid prior to that to avoid having gas?
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