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Festival 5 (Digestive and Metabolism)

front 1

Which vessel delivers nutrient-rich blood to the liver from the digestive tract?

hepatic vein
hepatic portal vein
inferior vena cava
central vein

back 1

Hepatic portal vein

front 2

The sheets of peritoneal membrane that hold the digestive tract in place are called ________.

mucosal lining
serosal lining
lamina propria
mesenteries

back 2

Mesenteries

front 3

Which of the following is not a phase of gastric secretion?

gastric
cephalic
intestinal
enterogastric

back 3

Enterogastric

front 4

Saliva does NOT __________.

clean the mouth
aid in the chemical digestion of proteins
contain carbohydrate-dissolving enzymes
dissolve food chemicals so that they can be tasted

back 4

aid in the chemical digestion of proteins

front 5

The __________ guards the entry of food into the stomach.

diaphragm
pyloric sphincter
ileocecal valve
cardiac sphincter

back 5

cardiac sphincter

front 6

What structural modification of the small intestine slows the movement of chyme through the lumen?

microvilli
circular folds
lacteals
villi

back 6

Circular folds

front 7

The mechanical and chemical receptors that control digestive activity are located ________.

in the walls of the tract organs
in the pons and medulla
in the glandular tissue that lines the organ lumen
in the oral cavity

back 7

in the walls of the tract organs

front 8

What muscle forms the labia of the mouth?

zygomaticus
orbicularis oris
orbicularis oculi
buccinator

back 8

Orbicularis oris

front 9

Most digestion and absorption of nutrients occur in the __________.

large intestine
liver
stomach
small intestine

back 9

Small intestine

front 10

The __________ is the serous membrane that lines the abdominal body wall.

mesentery
omenta
visceral peritoneum
parietal peritoneum

back 10

Parietal peritoneum

front 11

The absorptive effectiveness of the small intestine is enhanced by increasing the surface area of the mucosal lining. Which of the following accomplish this task?

plicae circulares, villi, and microvilli
the rugae and haustra
the vast array of digestive enzymes
Brunner's glands and Peyer Patches

back 11

plicae circulares, villi, and microvilli

front 12

Chemical digestion reduces large complex molecules to simpler compounds by the process of ________.

fermentation
anabolism
mastication
catabolism

back 12

Catabolism

front 13

How would you classify chewing food?

ingestion
digestion
mechanical breakdown
propulsion

back 13

Mechanical breakdown

front 14

Chyme is created in the ________.

esophagus
mouth
stomach
small intestine

back 14

Stomach

front 15

The innermost tissue layer of the alimentary canal is the __________.

serosa
mucosa
muscularis
submucosa

back 15

Mucosa

front 16

In a patient suffering from a gastric ulcer caused by Helicobacter pylori, the cells most likely to have been damaged first are the ______.

enteroendocrine cells
parietal cells
chief cells
mucous cells

back 16

Mucous cells

front 17

True or False:

When swallowing, the epiglottis prevents food from entering the larynx.

back 17

True

front 18

True or False:

All the chemical and mechanical phases of digestion from the mouth through the small intestine are directed toward changing food into forms that can pass through the epithelial cells lining the mucosa into the underlying blood and lymphatic vessels.

back 18

True

front 19

Which teeth are best suited for cutting or nipping off pieces of food in the permanent dentition?

canines
premolars (bicuspids)
molars
incisors

back 19

Incisors

front 20

The major means of propelling food through the digestive tract is __________.

swallowing
peristalsis
segmentation
churning

back 20

Peristalsis

front 21

From the esophagus to the anal canal, the walls of every organ of the alimentary canal are made up of the same four basic layers. Arrange them in order from the lumen.

serosa, mucosa, submucosa, and muscularis externa

mucosa, submucosa, muscularis externa, and serosa

submucosa, serosa, muscularis externa, and mucosa

muscularis externa, serosa, mucosa, and submucosa

back 21

mucosa, submucosa, muscularis externa, and serosa

front 22

Which hormone causes an increased output of enzyme-rich pancreatic juice and stimulates gallbladder contraction to release bile?

secretin
cholecystokinin
gastric inhibitor peptide
gastrin

back 22

Cholecystokinin

front 23

The chemical and mechanical processes of food breakdown are called ________.

ingestion
absorption
digestion
secretion

back 23

Digestion

front 24

True or False:

The peritoneum is the most extensive serous membrane in the body.

back 24

True

front 25

Which of the following is not a factor that helps create the stomach mucosal barrier?

replacing of damaged epithelial mucosa cells

production of intrinsic factor

thick coating of bicarbonate-rich mucus

tight junctions of epithelial mucosa cells

back 25

production of intrinsic factor

front 26

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

The stomach produces a double-layered coat of alkaline mucus.

The stomach has three layers of muscle in the muscularis tunic.

The stomach mucosa is folded into rugae.

The stomach releases enzymes to digest carbohydrates.

back 26

The stomach releases enzymes to digest carbohydrates.

front 27

If an incision has to be made in the small intestine to remove an obstruction, the first layer of tissue to be cut is the ________.

mucosa
submucosa
muscularis externa
serosa

back 27

Serosa

front 28

There are three phases of gastric secretion. The cephalic phase occurs ________.

at the end of a large meal, and the juices secreted are powerful and remain in the GI tract for a long period of time

when the meal is excessively high in acids and neutralization is required

immediately after food enters the stomach, preparing the small intestine for the influx of a variety of nutrients

before food enters the stomach and is triggered by aroma, sight, or thought

back 28

before food enters the stomach and is triggered by aroma, sight, or thought

front 29

Pepsinogen, a digestive enzyme, is secreted by the ________.

goblet cells of the small intestine
parietal cells of the duodenum
Brunner's glands
chief cells of the stomach

back 29

Chief cells of the stomach

front 30

What role of the stomach is essential to life?

production of intrinsic factor
production of chyme
production of VIP
production of hydrochloric acid

back 30

Production of intrinsic factor

front 31

Which vitamin requires intrinsic factor in order to be absorbed?

K
B12
A
C

back 31

B12

front 32

Which major process involves the elimination of indigestible substances from the body via the anus?

mechanical breakdown
defecation
ingestion
absorption

back 32

Defecation

front 33

What is the major digestive function of the pancreas?

production of digestive enzymes
production of glucagon
production of insulin
production of bicarbonate ions

back 33

Production of digestive enzymes

front 34

How are wisdom teeth (third molars) classified?

milk teeth
incisors
primary teeth
permanent teeth

back 34

Permanent teeth

front 35

Which layer of the alimentary canal contains the nerve supply of the enteric neurons that regulate digestive system activity?

submucosa
muscularis externa
mucosa
serosa

back 35

Submucosa

front 36

The mucosa collapses inward when the stomach is empty, forming large folds known as __________.

cardia
fundus
rugae
pylorus

back 36

rugae

front 37

What is a major function of pancreatic juice?

emulsifying fats by breaking them into smaller pieces

neutralizing chyme entering the small intestine from the stomach

acidifying the contents of the small intestine

acidifying the contents of the stomach

back 37

neutralizing chyme entering the small intestine from the stomach

front 38

Which chemical activates the transformation of trypsinogen to trypsin?

chymotrypsin
amylase
enteropeptidase
carboxypeptidase

back 38

Enteropeptidase

front 39

True or False:

When swallowing, the epiglottis prevents food from entering the larynx.

back 39

True

front 40

Which of the following does not occur in the mitochondria?

glycolysis
Krebs cycle
formation of malic acid from fumaric acid
electron transport

back 40

Glycolysis

front 41

Which of the following food groups are considered good sources of complete proteins?

corn, cottonseed oil, soy oil, and wheat germ

eggs, milk, yogurt, meat, and fish

egg yolk, fish roe, and grains

lima beans, kidney beans, nuts, and cereals

back 41

Eggs, milk, yogurt, meat, and fish

front 42

__________ is the key hormone regulator of the absorptive state.

Glucagon
Cortisol
Insulin
Parathyroid hormone

back 42

Insulin

front 43

True or False:

The body is able to form glucose from non-carbohydrate precursors.

back 43

True

front 44

Which of the following nutrients yield the highest amount of energy per gram when metabolized?

fats
proteins
foods and beverages high in caffeine
vitamins and minerals

back 44

Fats

front 45

True or False:

The primary function of carbohydrates is energy production within cells.

back 45

True

front 46

When proteins undergo deamination, the waste substance found in the urine is mostly________.

acetyl CoA
urea
ammonia
ketone bodies

back 46

Urea

front 47

Glycolysis occurs in the __________ of cells and is an __________ process.

mitochondria; aerobic
cytosol; anaerobic
cytosol; aerobic
mitochondria; anaerobic

back 47

Cytosol; anaerobic

front 48

True or False:

The preferred energy fuel for the brain is fat.

back 48

False

front 49

True or False:

Cellular respiration is an anabolic process.

back 49

False

front 50

Oxidative deamination takes place in the ________.

brain
muscles
blood
liver

back 50

Liver

front 51

True or False:

It would not be healthy to eliminate all fats from your diet because they serve a useful purpose in maintaining the body.

back 51

True

front 52

Which of the following mechanisms produces the most ATP during cellular respiration?

oxidative phosphorylation
lactic acid production
oxidation reactions
substrate-level phosphorylation

back 52

Oxidative phosphorylation

front 53

As the body progresses from the absorptive to the postabsorptive state, only the ________ continues to burn glucose while every other organ in the body mostly switches to fatty acids.

spleen
brain
pancreas
liver

back 53

Brain

front 54

Which term describes the breakdown of stored fats into glycerol and fatty acids?

lipolysis
beta oxidation
lipogenesis
ketogenesis

back 54

Lipolysis

front 55

Which nutrient molecule is the pivotal fuel molecule in the oxidative pathways?

glucose
cholesterol
fat
protein

back 55

Glucose

front 56

Which of the following is NOT a pathway in the oxidation of glucose?

Krebs cycle
gluconeogenesis
electron transport chain and oxidative phosphorylation
glycolysis

back 56

Gluconeogenesis

front 57

__________ are considered "bad" cholesterol; high blood levels are believed to increase the risk of cardiovascular disease.

HDLs
LDLs
Chylomicrons
VLDLs

back 57

LDLs

front 58

True or False :

There are no complete proteins. All animal products should be eaten with plant material to make a complete protein.

back 58

False

front 59

Which of the following is a water-soluble vitamin?

vitamin A
vitamin B
vitamin K
vitamin D

back 59

Vitamin B

front 60

The term metabolism is best defined as ________.

the number of calories it takes to keep from shivering on a cold day

the length of time it takes to digest and absorb fats

the sum of biochemical reactions involved in building and breaking down molecules

a measure of carbohydrate utilization, typically involving measurement of calories

back 60

the sum of biochemical reactions involved in building and breaking down molecules

front 61

Which nutrients function as coenzymes and are needed in only small amounts?

electrolytes
vitamins
carbohydrates
minerals

back 61

Vitamins

front 62

What is the primary function of cellular respiration - its end-purpose?

to oxidize glucose
to metabolize nutrients
to produce proteins
to generate ATP

back 62

To generate ATP

front 63

Which of the following would decrease body temperature?

shivering
eating a large meal
enhanced thyroxine release
dilation of cutaneous blood vessels

back 63

Dilation of cutaneous blood vessels

front 64

True or False:

The increased use of noncarbohydrate molecules for energy to conserve glucose is called glucose sparing.

back 64

True