Stras: Stool Flashcards
In what part of the digestive tract do pancreatic enzymes and bile salts contribute to digestion?
A. Large intestine
B. Liver
C. Small intestine
D. Stomach
C. Small intestine
Where does the reabsorption of water take place in the primary digestive process?
A. Large intestine
B. Pancreas
C. Small intestine
D. Stomach
A. Large intestine
Which of the following tests is not performed to detect osmotic diarrhea?
A. Clinitest
B. Fecal fats
C. Fecal neutrophils
D. Muscle fibers
C. Fecal neutrophils
The normal composition of feces includes all of the following except:
A. Bacteria
B. Blood
C. Electrolytes
D. Water
B. Blood
What is the fecal test that requires a 3-day specimen?
A. Fecal occult blood
B. APT test
C. Elastase I
D. Quantitative fecal fat testing
D. Quantitative fecal fat testing
The normal brown color of the feces is produced by:
A. Cellulose
B. Pancreatic enzyme
C. Undigested foodstuffs
D. Urobilin
D. Urobilin
Diarrhea can result from all of the following except:
A. Addition of pathogenic organisms to the normal intestinal flora
B. Disruption of the normal intestinal bacterial flora
C. Increased concentration of fecal electrolytes
D. Increased reabsorption of intestinal water and electrolytes
D. Increased reabsorption of intestinal water and electrolytes
Stools from persons with steatorrhea will contain excess amounts of:
A. Barium sulfate
B. Blood
C. Fat
D. Mucus
C. Fat
Which of the following pairings of stool appearance and cause does not match?
A. Black, tarry: blood
B. Pale, frothy: steatorrhea
C. Yellow-gray: bile duct obstruction
D. Yellow-green: barium sulfate
D. Yellow-green: barium sulfate
Stool specimens that appear ribbon-like are indicative of which condition?
A. Bile-duct obstruction
B. Colitis
C. Intestinal constriction
D. Malignancy
C. Intestinal constriction
A black tarry stool is indicative of:
A. Upper GI bleeding
B. Lower GI bleeding
C. Excess fat
D. Excess carbohydrates
A. Upper GI bleeding
Chemical screening tests performed on feces include all of the following except:
A. APT test
B. Clinitest
C. Pilocarpine iontophoresis
D. Trypsin digestion
C. Pilocarpine iontophoresis
Secretory diarrhea is caused by:
A. Antibiotic administration
B. Lactose intolerance
C. Celiac sprue
D. Vibrio cholerae
D. Vibrio cholerae
The fecal osmotic gap is elevated in which disorder?
A. Dumping syndrome
B. Osmotic diarrhea
C. Secretory diarrhea
D. Steatorrhea
B. Osmotic diarrhea
Microscopic examination of stools provides preliminary information as to the cause of diarrhea because:
A. Neutrophils are present in conditions caused by toxin-producing bacteria
B. Neutrophils are present in conditions that affect the intestinal wall
C. Red and white blood cells are present if the cause is bacterial
D. Neutrophils are present if the condition is of nonbacterial etiology
B. Neutrophils are present in conditions that affect the intestinal wall
Microscopic examination of stools provides preliminary information as to the cause of diarrhea because:
A. Neutrophils are present in conditions caused by toxin-producing bacteria
B. Neutrophils are present in conditions that affect the intestinal wall
C. Red and white blood cells are present if the cause is bacterial
D. Neutrophils are present if the condition is of nonbacterial etiology
B. Neutrophils are present in conditions that affect the intestinal wall
True or False: The presence of fecal neutrophils would be expected with diarrhea caused by a rotavirus
FALSE
Large orange-red droplets seen on direct microscopic examination of stools mixed with Sudan III represent:
A. Cholesterol
B. Fatty acids
C. Neutral fats
D. Soaps
C. Neutral fats
Microscopic examination of stools mixed with Sudan III and glacial acetic acid and then heated will show small orange-red droplets that represent:
A. Fatty acids and soaps
B. Fatty acids and neutral fats
C. Fatty acids, soaps, and neutral fats
D. Soaps
C. Fatty acids, soaps, and neutral fats
When performing a microscopic stool examination for muscle fibers, the structures that should be counted:
A. Are coiled and stain blue
B. Contain no visible striations
C. Have two-dimensional striations
D. Have vertical striations and stain red
C. Have two-dimensional striations
A value of 85% fat retention would indicate:
A. Dumping syndrome
B. Osmotic diarrhea
C. Secretory diarrhea
D. Steatorrhea
D. Steatorrhea
Which of the following tests would not be indicative of steatorrhea?
A. Fecal elastase-I
B. Fecal occult blood
C. Sudan III
D. Van de Kamer
B. Fecal occult blood
Gum guaiac is preferred over ortho-tolidine for “occult” blood in mass screening tests because:
A. There is less interference from dietary hemoglobin
B. Ortho-tolidine is less sensitive
C. Gum guaiac reacts equally with formed and watery stools
D. Filter paper is more easily impregnated with gum guaiac
A. There is less interference from dietary hemoglobin
What is the recommended number of samples that should be tested to confirm a negative occult blood result?
A. One random specimen
B. Two samples taken from different parts of three stools
C. Three samples taken from the outermost portion of the stool
D. Three samples taken from different parts of two stools
B. Two samples taken from different parts of three stools
Which test is more sensitive to upper GI bleeding?
A. Guaic fecal occult blood
B. Hemoquant
C. Immunochemical fecal occult blood
D. Sudan III
B. Hemoquant
Annual testing for fecal occult blood has a high predictive value for the detection of:
A. Colorectal cancer
B. Malabsorption syndromes
C. Pancreatic deficiencies
D. Ulcers
A. Colorectal cancer
Tests for the detection of “occult” blood rely on the:
A. Reaction of hemoglobin with hydrogen peroxide
B. Pseudoperoxidase activity of hemoglobin
C. Reaction of hemoglobin with ortho-tolidine
D. Pseudoperoxidase activity of hydrogen peroxide
B. Pseudoperoxidase activity of hemoglobin
What is the significance of an APT test that remains pink after addition of sodium hydroxide?
A. Fecal fat is present.
B. Fetal hemoglobin is present.
C. Fecal trypsin is present.
D. Vitamin C is present.
B. Fetal hemoglobin is present.
In the Van de Kamer method for quantitative fecal fat determinations, fecal lipids are:
A. Converted to fatty acids prior to titrating with sodium hydroxide
B. Homogenized and titrated to a neutral endpoint with sodium hydroxide
C. Measured gravimetrically after washing
D. Measured by spectrophotometer after addition of Sudan III
A. Converted to fatty acids prior to titrating with sodium hydroxide
A patient whose stool exhibits increased fats, undigested muscle fibers, and the inability to digest gelatin may have:
A. Bacterial dysentery
B. A duodenal ulcer
C. Cystic fibrosis
D. Lactose intolerance
C. Cystic fibrosis
A stool specimen collected from an infant with diarrhea has a pH of 5.0. This result correlates with a:
A. Positive APT test
B. Negative trypsin test
C. Positive Clinitest
D. Negative occult blood test
C. Positive Clinitest
Which of the following tests differentiates a malabsorption cause from a maldigestion cause in steatorrhea?
A. APT test
B. D-xylose test
C. Lactose tolerance test
D. Occult blood test
B. D-xylose test
