Chapter 23

Question 1

The major site for nutrient absorption is the __________.

Answer 1

small intestine

Question 2

The primary goal of digestive tract regulatory mechanisms is to optimize nutrient breakdown and absorption.

Answer 2

True

Question 3

The serous membrane that covers the external surface of most digestive organs is called the __________.

Answer 3

visceral peritoneum

Question 4

__________ circulation collects nutrient-rich blood from the GI tract and delivers it to the liver.

Answer 4

Hepatic portal

Question 5

serosa

Answer 5

protective outermost layer of the alimentary canal

Question 6

mucosa

Answer 6

. main site of nutrient absorption

Question 7

submucosa

Answer 7

C. moderately dense connective tissue that has a rich supply of blood, lymphatic vessels, and nerve fibers

Question 8

muscularis externa

Answer 8

. responsible for segmentation and peristalsis

Question 9

Saliva contains enzymes that break down proteins.

Answer 9

False

Question 10

The permanent dentition consists of __________ teeth in a full set.

Answer 10

32

Question 11

A weak gastroesophageal sphincter can result in heartburn.

Answer 11

true

Question 12

Which of the following is NOT a function of the stomach?

Answer 12

The stomach chemically digests lipids.

Question 13

The phases of gastric secretion from first to last are __________.

Answer 13

cephalic phase, gastric phase, intestinal phase

Question 14

The increased concentration of HCO3- in blood draining from the stomach is called __________.

Answer 14

the alkaline tide

Question 15

The __________ is the first segment of the small intestine.

Answer 15

duodenum

Question 16

Digestion of carbohydrates and proteins by brush border enzymes occurs within the ________ of the small intestine.

Answer 16

microvilli

Question 17

Bile is stored and concentrated in the __________.

Answer 17

gallbladder

Question 18

Which of the following is NOT a characteristic of the liver?

Answer 18

It has three lobes.

Question 19

__________ is NOT found in pancreatic secretions.

Answer 19

Cholecystokinin (CCK)

Question 20

Most digestion occurs in the small intestine.

Answer 20

True

Question 21

Most water is absorbed in the __________.

Answer 21

small intestine

Question 22

Bacterial flora in the large intestine do NOT produce __________.

Answer 22

intrinsic factor

Question 23

Diarrhea results when food passes too quickly through the large intestine.

Answer 23

True

Question 24

lipids

Answer 24

. fatty acids and monoglycerides

Question 25

proteins

Answer 25

amino acids

Question 26

carbohydrates

Answer 26

. monosaccharides

Question 27

nucleic acids

Answer 27

nucleotides

Question 28

Pepsin enzymatically digests __________.

Answer 28

protein

Question 29

Someone on a fat-free diet would not efficiently absorb vitamin D from their diet.

Answer 29

true

Question 30

Which of the following is NOT an accessory organ of the digestive system?

Answer 30

intestines