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the process of providing nutrition for the body
- alimentation
- from the latin word alimentum, meaning to nourish+ation = process
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in human beings is the oral taking of substances into the body
ingestion
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-the mechanical and chemical conversion of food into substances that can eventually be absorbed by cells
-mechanical: accomplished by chewing
-chemical: begins in in the mouth and completed in the stomach
digestion
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the process in which the digested food molecules pass through the lining of the small intestine into the blood or lymph capillaries
absorption
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the elimination of wastes through the anus in the form of feces
defecation
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the 3 major classes of nutrients
carbohydrates, proteins, lipids
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the basic source of energy for human cells, include sugars and starches
carbohydrates
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required for the chemical break down of nutrient into similar substances
enzymes
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-ose vs -ase
- -ose: meaning sugar
- -ase: meaning enzyme
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the eventual product of the digestion of sugars as well as starches; it is a simple sugar that is the major source of energy for the body
glucose
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the enzyme that breaks down starch
- amylase
- amyl/o = starch
- -ase = enzyme
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the effective enzyme that breaks down protein
- protease or proteinase
- proteo/o or protein/o = protein
- -ase = enzyme
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the effective enzyme that breaks down a lipid (fat)
- lipase
- lip/o = fat
- -ase = enzyme
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de-
down, from, reversing, or removing
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basically a long muscular tube that is lined with mucous membrane, begins at the mouth and ends at the anus
alimentary canal or digestive tract
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refers to the stomach and the intestines
gastrointestinal
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consists of the mouth, pharynx, esophagus, and stomach
upper gastrointestinal tract (UGI)
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made up of the small and large intestine
lower gastrointestinal tract (LGI)
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dent/i, dent/o, odont/o
teeth
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intestin/o, enter/o
- intestines
- enter/o sometimes refers only to the small intestine
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col/o, colon/o
- colon or large intestine*
- the colon makes up most of the large intestine, therefore, the word colon is sometimes used inaccurately as a synonym for the entire large intestine
- in words containing col/o, the distinction between the colon and large intestine is usually not significant
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append/o, appendic/o
appendix
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the liver produces this which breaks down fats before absorption by the small intestine; continually produced by the liver and is either stored by the gallbladder or conveyed to the small intestine for immediate use
bile
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means pertaining to the common bile duct
- choledoch al
- choledoch/o = common bile duct
- -al = pertaining to
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sometimes formed within the gallbladder and can be lodged there for years without causing problems
gallstones
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a small organ with two impt functions: (1) it produces pancreatic juice which is impt in the digestion of food and (2) it produces insulin
pancreas
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a hormone that regulates the blood sugar level
insulin
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located in the oral cavity and responsible for producing saliva
salivary glands
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choledoch/o
common bile duct
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an x-ray image of the esophagus taken while the patient swallows a liquid barium susension
esophagram or esophagogram
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ingested in upper GI series, and the radiographic examination is made as the barium passes through the esophagus, stomach and duodenum
barium meal
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the lower intestinal tract is studied with a ___, a rectal infusion of barium sulfate
barium enema
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x-ray examination of the gallbladder; accomplished by rendering the gallbladder and ducts opaque with a contrast medium; rarely used today having been replaced by sonography
chole cysto graphy
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the presence of gall stones
chole lith iasis
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if the flow of bile is obstructed by a stone or in certain liver diseases, this condition is called ___; characterized by yellowing of the skin, whites of the eyes, mucous membranes and body fluids as a result of deposition of bile pigment
jaundice
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if a gallstone moves into the common bile duct
- choledocho lith iasis
- choledoch/o = common bile duct
- lith/o = stone
- -iasis = condition
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the salivary ducts can be studied by injecting radiopaque substances into the ducts in a procedure called a ____, which may be used to demonstrate the presence of calculi in the ducts
sialography
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upper gastrointestinal ____ is visual examination of the esophagus, stomach, and duodenum
endoscopy
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focus of endoscopy procedure is on the examination of the esophagus, this procedure is called ____
esophagoscopy
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the endoscopic examination of the lining of the colon
colono scopy
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instrument used for colonoscopy
colonoscope
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the same meaning as colonoscopy but is less commonly used; the physician may also obtain tissue biopsy specimens or remove polyps during this procedure
coloscopy
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primarily a result of resistance to insulin or lack of insulin secretion by the insulin secreting cells of the pancreas
diabetes mellitus (DM)
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without insulin, glucose builds up in the bood and results in ____; an increase in glucose level in the blood; ultimately results in the classic symptoms of DM: polyphagia, polyuria, polydipsia
- hyper glyc emia
- hyper = increased
- glyc/o = sugar
- -emia = blood
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means excessive hunger or uncontroled eating
- polyphagia
- poly = many
- phagia = eating
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excessive urination
polyuria
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means excessive thirst
polydipsia
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glucose in the urine
glycosuria
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type 1 or 2 DM? genetically determined and results in absolute insulin deficiency; however, most people with this gene never develop this type of diabetes
type 1 DM
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type 1 or 2 DM? genetics, environ factors, aging and obesity may contribute to its development; characterized by insulin resistance rather than insufficient secretion
type 2 DM
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first recognized during pregnancy, is carbohydrate intolerance, usually caused by a deficiency of insulin; it disappears after delivery of the infant but in a significant number of cases, returns years later
gestational diabetes mellitus
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another dysfunction of the pancreas in which it produces too much insulin; the blood contains less than normal amount of sugar
- hypo glycemia
- hypo = less than normal
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an increased amount of fat or lipids in the blood
hyperlipidemia or hyperlipemia
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abnormal increase in the proportion of fat cells of the body
obesity
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a person is regarded medically obese if he/she is _% above the desirable body weight for the person's age, sex, height and body type
20%
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a word that means vomiting
emesis
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excessive leanness caused by disease or lack of nutrition
emaciation
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associated with psychological stress or conflict, is a disorder characterized by prolonged refusal to eat that results in emaciation
anorexia nervosa
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another type of emotional disorder associated with food, is characterized by episodes of binge eating that often terminate in self induced vomiting
bulimia
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either prolonged anorexia or bulimia leads to depletion of nutrients for body cells and results in ____; can be caused by malabsorption
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a complex of symtoms that include anorexia, weight loss, flatulence, muscle cramps and bone pain
malabsorption syndrome
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excessive gas in the stomach and intestinal tract that leads to bloating
flatulence
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ulcers, chiefly of the mouth and lips
canker sores
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inflammation of the lip
- cheilitis
- cheil/o = lip
- itis = inflammation
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inflammation of the gums
gingivitis
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inflammation of the tongue; the tongue is painful, sometimes covered with ulcers, and swallowing is difficult
glossitis
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inflammation of the mouth
stomatitis
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inability to swallow or difficulty in swallowing
- dysphagia
- dys = painful or difficult
- phag/o = eat
- -ia = condition
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a complex of enlarged and swollen veins at the lower end of the esophagus that are susceptible to hemorrhage
esophageal varices
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inflammation of the esophagus
esophagitis
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a condition resulting from a backflow of the stomach contents into the esophagus; the acidic gastric juices cause burning pain in the esophagus; repeated episodes of reflux can result in esophagitis, narrowing of the esophagus, or an esophageal ulcer; treatment is elevation of the head of the bed, avoidance of acid-stimulating foods and the use of antacids or antiulcer medications
gastroesophageal reflux disease (GERD)
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inflammation of the stomach
- gastritis
- gastr/o = stomach
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herniation of the stomach; a common tpe of this is a hiatus or hiatal hernia, protrusion of a structure through the opening in the diagphragm that allows passage of the esophagus; often the protruding structure is part of the stomach
gastrocele
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inflammation of the stomach and the intestinal tract
- gastroenteritis
- enter/o = intestine
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an excessive amount of acid in the stomach; the condition may lead to ulceration of the stomach and is treated with antacids or antiulcer medications; antibiotics are also effective in certain cases
hyperacidity
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a lesion of the mucous membrane, accompanied by the sloughing (shedding) of dead tissue
ulcer
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bleeding of the upper digestive structures, sometimes evidence of blood in the vomit
upper gastrointestinal bleeding
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inflammation of the veriform appendix
appendicitis
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inflammation of the colon
colitis
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inflammation fo the diverticulum in the intestinal tract; esp in the colon, causing stagnation, or lack of movement, of feces and pain
diverticulitis
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performed if diverticulitis is severe
diverticulectomy
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a small sac or pouch in the wall of an organ
diverticulum
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the presence of diverticula without inflammation, a condition that affects a number of people older than 50 years and may cause few symptoms
diverticulosis
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an ulcer of the duodenum; bleeding is sometimes present with this type of ulcer; perforation can occur, which can lead to peritonitis
duodenal ulcer
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inflammation of the duodenum
duodenitis
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stoppage or delay in the passage of food through the intestine
- enterostasis
- enter/o = intestine
- -stasis = stopping
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masses of veins in the anal canal that are unnaturally distended and lie just inside or outside the rectum; they are often accompanied by pain, itching, and bleeding
hemorrhoids
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abnormally increased motility of the small and large intestines of unknown origins; most of those affected are young adults who report diarrhea and occasionally pain in the abdomen, usually relieved by passing gas or stool
- irritable bowel syndrome (IBS)
- also called... functional bowel syndrome, mucous colitis or spastic colon
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bleeding of the lower digestive structures
lower gastrointestinal bleeding
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inflammation of the gallbladder
- cholecystitis
- cholecyst/o = gallbladder
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formation or presence of gallstones in the gallbladder or common bile duct
- cholelithiasis
- chol/e = gall or bile
- lith/o = stone
- -iasis = condition
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stoppage of bile excretion
cholestasis
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a chronic liver disease characterized by marked degeneration of liver cells
cirrhosis
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inflammation of the liver
hepatitis
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enlargement of the liver
hepatomegaly
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a general term for disease characterized by excessive urination, but it usually refers to DM
diabetes
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a condition in which the blood glucose level is abnormally low; it can be caused by excessive production of insulin by the pancreas or excessive injection of insulin
hypoglycemia
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inflammation of the pancreas
pancreatitis
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appetite suppressing drug
anorexiant
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surgical approach for treating extreme obesity, generally tried when conservative methods have failed, limit food intake or absorption by either ___ or ___
- gastro plasty
- or gastric bypass
- these surgeries reduce the stomach's capacity
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used to treat diarrhea
anti diarrheals
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used to relieve or prevent vomiting
anti emetics
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cause evacuation of the bowel and may be prescribed to correct constipation
laxatives
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strong medications used to promote full evacuation of the bowel, as in preparation for diagnostic studies or surgery of the digestive tract
purgatives or cathartics
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what are some non-surgical treatments for removal of gallstones?
- 1. oral drugs that dissolve the stones
- 2. laser lithotripsy (tripsy = surgical crushing)
- 3. shock wave litrotripsy
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the gall bladder is excised with a laser and removed through a small incision in the abdominal wall
laparoscopic cholecystectomy
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removal of the veriform appendix; is removed when it is acutely infected to prevent peritonitis, which can occur if the appendix ruptures
appendectomy
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surgical removal of the gallbladder; exploration of the common bile duct is often performed during this
cholecystectomy
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performed during cholecystectomy; the biliary vessels are injected with a contrast medium and x-ray images are taken to determine whether stones are present
- cholangiography
- chol/e = bile
- angi/o = vessel
- graphy = recording
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creation of an artificial anus on the abdominal wall by incising the colon and drawing it out to the surface; is performed when the feces cannot pass through the colon and out through the anus
colostomy
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surgical removal of all or part of the stomach
gastrectomy
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surgical removal of part of the stomach where the remaining portion of the stomach is joined to the duodenum
gastroduodenostomy
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surgical creation of a new opening into the stomach through the abdominal wall; this allows the insertion of a synthetic feeding tube and is performed when the patient cannot eat normally
gastrostomy
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removal of hemorrhoids by any of several means, including surgery
hemorrhoidectomy
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creation of a surgical passage through the abdominal wall into the ileum; is necessary when the large intestine has been removed; fecal material from the ileum drains thorough an opening called a STOMA into a bag worn on the abdomen
ileostomy
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examination of the abdominal cavity with a laparoscope through one or more small incisions in the abdominal wall; done for inspection of abdominal organs and also for laparoscopic surgeries
laparoscopy
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removal of tissue from the liver for patholigic examination
liver biopsy
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removal of liver by using a needle to puncture the skin overlying the liver; considered a closed biopsy
percutaneous liver biopsy
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excision of a pancreatic stone
pancreatolithectomy
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resection (partial excision) of portions of the vagus nerve near the stomach; this procedure is performed to decrease the amt of gastric juices by severing the nerve (vagus nerve) that controls their release
vagotomy
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