Ch.18 Quiz Flashcards
Choose the statement that correctly characterizes the GI tract.
Body tissues are composed of substrates similar to food; thus, they would be degraded by enzymes in the GI tract if exposed to the internal environment of the GI tract.
All of the choices are correct.
The two openings of the GI tract permit two-way transport of food, which maximizes absorption.
The harsh environment in the GI tract allows for the absorption of indigestible materials without harming body tissues.
Body tissues are composed of substrates similar to food; thus, they would be degraded by enzymes in the GI tract if exposed to the internal environment of the GI tract.
While considered an organ of the gastrointestinal system, the ________ is not part of the gastrointestinal tract.
small intestine
esophagus
pharynx
liver
liver
Which of the following disorders occurs as a result of acidic gastric juice traveling up into the esophagus?
Gastroesophageal reflux disease
Pernicious anemia
Gastritis
Gastroenteritis
Gastroesophageal reflux disease
If ________ were absent, intestinal absorption of vitamin B12 could not occur.
vitamin D
vitamin C
intrinsic factor
calcium
intrinsic factor
Which of the following is one of the phases of swallowing?
Pharyngeal
Segmentation
Reflux
Peristalsis
Pharyngeal
What is the function of Paneth cells of the small intestine?
Produce digestive enzymes
Divide by mitosis to make new mucosa cells
Produce mucus
Produce lysozyme and defensins
Produce lysozyme and defensins
The ________ is NOT a section of the small intestine.
cecum
jejunum
duodenum
ileum
cecum
Slow waves of the intestine are produced by what type of cells?
Gastric
SXR
Microflora
Cajal
Cajal
The process of waste removal is called ________.
mastication
deglutition
segmentation
defecation
defecation
The outer surface bulges of the large intestine are called ________.
colon
cecum
crypts
haustra
haustra
What role do bile salts play in digestion?
Needed for water reabsorption
Emulsify lipids for digestion by enzymes
Gives color to the feces
They play no role in digestion.
Emulsify lipids for digestion by enzymes
Choose the substance NOT produced by the liver.
Digestive enzymes
Hydroxylated steroid hormones
Uric acid
Bilirubin
Digestive enzymes
Bile is produced by ________.
sinusoids
hepatocytes
gall bladder cells
Kupffer cells
hepatocytes
The enterohepatic circulation is between the ________ and ________.
liver; stomach
liver; gallbladder
liver; intestine
liver; pancreas
liver; intestine
Enterogastrone will ________ gastric function.
stimulate
inhibit
have no effect on
inhibit
