Macroscopic Screening

Question 1

brown color of the feces results from intestinal oxidation of _

Answer 1

stercobilinogen to urobilin

Question 2

degradation of Hgb -> conjugated bilirubin (passes through the bile duct to the small intestine) -> urobilinogen-> _

Answer 2

stercobilinogen

Question 3

Therefore, stools that appear _ (acholic stools) may signify a blockage of the bile duct. Pale stools are also associated with diagnostic procedures that use _.

Answer 3

pale; barium sulfate

Question 4

color of stool with blood that originates from the esophagus, stomach, or duodenum takes approximately 3 days to appear in the stool

Answer 4

black, tarry stool

Question 5

blood from the _ GI tract requires less time to appear and retains its original red color

Answer 5

lower

Question 6

_ stools may be observed in patients taking oral an- tibiotics, because of the oxidation of fecal bilirubin to _

Answer 6

Green; biliverdin

Question 7

Stool color with possible cause of:

Upper GI bleeding
Iron therapy
Charcoal
Bismuth (antacids)

Answer 7

Black

Question 8

Stool color with possible cause of:

Lower GI bleeding
Beets and food coloring
Rifampin

Answer 8

Red

Question 9

Stool color with possible cause of:

Bile-duct obstruction
Barium sulfate

Answer 9

Pale yellow, White, Gray

Question 10

Stool color with possible cause of:

Biliverdin/oral antibiotics
Green vegetables

Answer 10

Green

Question 11

Stool color with possible cause of:

Bile-duct obstruction
Pancreatic disorders

Answer 11

Bulky/frothy

Question 12

Stool color with possible cause of:

Intestinal constriction

Answer 12

Ribbon-like

Question 13

Stool color with possible cause of:

Colitis
Dysentery
Malignancy
Constipation

Answer 13

Mucus- or blood-streaked mucus