Chapter 23 Flashcards
The major site for nutrient absorption is the __________.
small intestine
The primary goal of digestive tract regulatory mechanisms is to optimize nutrient breakdown and absorption.
True
The serous membrane that covers the external surface of most digestive organs is called the __________.
visceral peritoneum
__________ circulation collects nutrient-rich blood from the GI tract and delivers it to the liver.
Hepatic portal
serosa
protective outermost layer of the alimentary canal
mucosa
. main site of nutrient absorption
submucosa
C. moderately dense connective tissue that has a rich supply of blood, lymphatic vessels, and nerve fibers
muscularis externa
. responsible for segmentation and peristalsis
Saliva contains enzymes that break down proteins.
False
The permanent dentition consists of __________ teeth in a full set.
32
A weak gastroesophageal sphincter can result in heartburn.
true
Which of the following is NOT a function of the stomach?
The stomach chemically digests lipids.
The phases of gastric secretion from first to last are __________.
cephalic phase, gastric phase, intestinal phase
The increased concentration of HCO3- in blood draining from the stomach is called __________.
the alkaline tide
The __________ is the first segment of the small intestine.
duodenum
Digestion of carbohydrates and proteins by brush border enzymes occurs within the ________ of the small intestine.
microvilli
Bile is stored and concentrated in the __________.
gallbladder
Which of the following is NOT a characteristic of the liver?
It has three lobes.
__________ is NOT found in pancreatic secretions.
Cholecystokinin (CCK)
Most digestion occurs in the small intestine.
True
Most water is absorbed in the __________.
small intestine
Bacterial flora in the large intestine do NOT produce __________.
intrinsic factor
Diarrhea results when food passes too quickly through the large intestine.
True
lipids
. fatty acids and monoglycerides
proteins
amino acids
carbohydrates
. monosaccharides
nucleic acids
nucleotides
Pepsin enzymatically digests __________.
protein
Someone on a fat-free diet would not efficiently absorb vitamin D from their diet.
true
Which of the following is NOT an accessory organ of the digestive system?
intestines