Site MapHelpFeedbackMultiple Choice Quiz
Multiple Choice Quiz
(See related pages)



1

Which of the following is NOT a function of the digestive system?
A)ingest food
B)digest food to small molecules
C)absorb nutrient molecules
D)eliminate non-digestible wastes
E)transport nutrients to other organs
2

"Digestion" of food refers to
A)allowing the liver to produce bile for digestion.
B)allowing the pancreas to release digestive enzymes.
C)allowing small molecules to cross cell membranes and be absorbed by the tract lining.
D)allowing large molecules to cross cell membranes and be absorbed by the tract lining.
E)allowing the meat that is eaten to nourish our body.
3

Strictly speaking, ____ refers to the breakdown of food by enzymatic action.
A)ingestion
B)digestion
C)excretion
D)metabolism
E)mastication
4

Which of the following statements is NOT correct?
A)Digestion only takes place within the digestive tract.
B)The digestive tract begins with the mouth and ends with the anus.
C)Digestion of food in humans is a process that occurs inside of cells.
D)Digestive enzymes are secreted into the tract by glands located either in the tract or nearby.
E)Food is never found within accessory glands, only within the tract itself.
5

Taste is due solely to stimulation of receptors in the nose.
A)True
B)False
6

Which of the following sequences does NOT trace the path of food through the digestive tract in the correct order?
A)mouth, esophagus, stomach
B)esophagus, stomach, duodenum
C)stomach, large intestine, small intestine
D)stomach, duodenum, large intestine
E)ascending colon, transverse colon, descending colon
7

____ are chisel-shaped teeth used for biting.
A)Incisors
B)Canines
C)Premolars
D)Molars
E)Wisdom teeth
8

Nerves and blood vessels are found within the ____ of a tooth.
A)enamel
B)dentin
C)pulp
D)crown
E)periodontal membrane
9

Which of the following comparisons is NOT correct?
A)caries--tooth decay
B)gingivitis--inflammation of the gums
C)periodontitis--inflammation of the periodontal membrane
D)mumps--viral infection of the tonsils
E)heartburn--stomach acid in the esophagus
10

Which of the following comparisons is NOT correct?
A)stomach--food storage and grinding
B)esophagus--food conduction
C)pharynx--voice box
D)small intestine--nutrient absorption
E)large intestine--water and salt absorption
11

Which of the following comparisons is NOT correct?
A)bolus--food mixed with saliva in the mouth
B)chyme--food mixed with gastric secretions leaving the stomach
C)gastric juice--secretions from intestinal glands
D)feces--nondigestible remains, bile, and bacteria
E)peristalsis--rhythmic contractions to move food
12

Sphincters are muscles that encircle tubes and act as valves.
A)True
B)False
13

Which of the following hormones will cause the stomach to churn and increase secretory activity of the gastric glands?
A)GIP
B)gastrin
C)secretin
D)CCK
E)insulin
14

Which of the following hormones is/are produced by cells of the duodenal wall?
A)gastrin alone
B)GIP alone
C)secretin alone
D)CCK alone
E)secretin and CCK
15

If hydrochloric acid penetrates the mucus on the stomach wall, autodigestion of the wall begins, and an ulcer results.
A)True
B)False
16

Which of the following substances will cause the release of secretin from the duodenal wall?
A)carbohydrates
B)fats
C)partially digested protein
D)hydrochloric acid in chyme
E)sodium hydroxide in chyme
17

What allows chyme to enter the small intestine?
A)a sphincter between the esophagus and the stomach
B)a sphincter between the stomach and the small intestine
C)the anal sphincter
D)lacteal
E)ileocecal valve
18

Which organ will secrete sodium bicarbonate to neutralize the acidity of chyme in the small intestine?
A)pancreas
B)gallbladder
C)duodenum
D)esophagus
E)stomach
19

Where are the brush-border enzymes found?
A)villi
B)microvilli
C)columnar epithelial cells
D)goblet cells
E)lacteal
20

The end products of lipid, protein, and carbohydrate digestion enter the blood capillaries of the villi.
A)True
B)False
21

Which of the following statements is NOT correct?
A)Microvilli increase the surface area of the small intestine for absorption of nutrients.
B)Enzymes located on the brush-border finish the digestion of chyme.
C)Absorption is an active process in the small intestine.
D)Sugars and amino acids cross columnar epithelial cells to enter the lacteal.
E)Fat components rejoin in epithelial cells and are packaged as lipoprotein droplets, which enter the lacteals.
22

Which of the following organs will contain villi?
A)esophagus
B)stomach
C)small intestine
D)liver
E)pancreas
23

Most bacteria that live in the colon are facultative bacteria.
A)True
B)False
24

Which of the following organs is NOT part of the large intestine?
A)cecum
B)colon
C)rectum
D)anal canal
E)duodenum
25

Which of the following organs functions to absorb water, salts, and store nondigestible material?
A)esophagus
B)stomach
C)small intestine
D)large intestine
E)liver
26

The ____ is the blind end of the ascending colon.
A)cecum
B)vermiform appendix
C)transverse colon
D)anal canal
E)rectum
27

Which of the following comparisons is NOT correct?
A)constipation--hard and dry feces
B)ulcer--open sore in the wall of the stomach
C)peritonitis--inflammation of the cecum
D)cirrhosis--liver first becomes fatty and then replaced by fibrous scar tissue
E)jaundice--abnormally large amount of bilirubin in the skin and the whites of the eyes
28

Which of the following statements is NOT correct?
A)A high coliform bacterial count indicates a significant amount of feces has entered the water.
B)When the appendix bursts, a generalized infection of the serosa of the abdominal cavity can occur.
C)If colon cancer is detected while still confined to a polyp, the outcome is expected to be a complete cure.
D)Fiber in the diet promotes the development of colon cancer.
E)Bacteria in the colon break down nondigestible material and produce some vitamins that can be absorbed and used by our bodies.
29

Which of the following statements is false?
A)Diarrhea can be caused by eating contaminated food, which causes the intestinal wall to become irritated and peristalsis to increase.
B)In nervous diarrhea, the nervous system stimulates the intestinal wall and diarrhea results.
C)Prolonged diarrhea can lead to constipation.
D)Constipation can be alleviated by increasing water intake.
E)Constipation can be alleviated by increasing the fiber content of our diet.
30

In diarrhea, too little water has been absorbed by the large intestine; in constipation, too much water has been absorbed.
A)True
B)False
31

Milk of magnesia acts as a laxative because it makes the colon slippery.
A)True
B)False
32

Which of the following organs is considered an accessory organ of digestion?
A)liver
B)stomach
C)esophagus
D)ascending colon
E)rectum
33

Which of the following organs has both an endocrine and an exocrine function?
A)pancreas
B)liver
C)stomach
D)duodenum
E)esophagus
34

Which of the following organs produces bile?
A)gallbladder
B)liver
C)duodenum
D)stomach
E)large intestine
35

Which component in bile helps to emulsify fat in the duodenum?
A)bilirubin
B)biliverdin
C)bile salts
D)cholesterol
36

Which blood vessel will transport nutrient molecules that have been absorbed by the small intestine to the liver?
A)hepatic artery
B)renal vein
C)hepatic portal artery
D)hepatic portal vein
E)inferior vena cava
37

Which of the following organs functions to remove poisonous substances and works to keep the contents of blood constant?
A)esophagus
B)stomach
C)duodenum
D)pancreas
E)liver
38

Before amino acids can be converted to glucose molecules in the liver, deamination must take place.
A)True
B)False
39

Which of the following is NOT a function of the liver?
A)converts hemoglobin from red blood cells to bile pigments that are excreted along with bile salts in bile
B)detoxifies blood by removing poisonous substances
C)produces urea from the breakdown of amino acids
D)produces enzymes for digestion of food in the duodenum
E)makes plasma proteins from amino acids
40

In which of the following diseases will liver tissue be replaced by inactive fibrous scar tissue?
A)hemolytic jaundice
B)obstructive jaundice
C)viral hepatitis
D)cirrhosis
E)lactose intolerance
41

Red blood cells are broken down in abnormally large amounts in ____.
A)hemolytic jaundice
B)obstructive jaundice
C)viral hepatitis
D)cirrhosis
E)lactose intolerance
42

Which of the following statements is NOT true about digestive enzymes?
A)Digestive enzymes are hydrolytic enzymes.
B)Digestive enzymes are carbohydrates that have a particular shape that fits their substrate.
C)Digestive enzymes have an optimum pH which maintains their shape.
D)Digestive enzymes speed up a chemical reaction.
E)Each digestive enzyme speeds up a specific reaction.
43

Which of the following organs will NOT produce any digestive enzymes?
A)salivary glands
B)stomach
C)esophagus
D)duodenum
E)pancreas
44

Which of the following enzymes will have an optimum pH that is acidic?
A)salivary amylase
B)pepsin
C)pancreatic amylase
D)trypsin
E)lipase
45

Which of the following statements is NOT correct about fat digestion?
A)Bile salts are needed to emulsify fat into fat droplets.
B)Lipase digests the fat droplets into glycerol and fatty acid molecules while removing water molecules.
C)Glycerol and fatty acids enter the cells of the villi.
D)Glycerol and fatty acids, after entering the cells of the villi, rejoin and are packaged as lipoprotein droplets.
E)Lipoprotein droplets, which are formed in the cells of the villi, enter the lacteals.
46

Pepsinogen is converted to pepsin in the stomach when exposed to ____.
A)trypsin
B)hydrochloric acid
C)peptides
D)peptidases
E)lipase
47

Which of the following enzymes is found on the mucosa of the intestinal villi?
A)amylase
B)trypsin
C)peptidase
D)lipase
E)pepsin
48

Which of the following enzymes is released from the gastric glands to break down proteins into peptides?
A)lipase
B)pancreatic amylase
C)trypsin
D)pepsin
E)peptidase
49

Which enzyme breaks down starch to maltose in the duodenum?
A)lipase
B)trypsin
C)maltase
D)salivary amylase
E)pancreatic amylase
50

Which of the following relationships is NOT correct?
A)pepsin--gastric glands
B)maltase--pancreas
C)salivary amylase--salivary glands
D)trypsin--pancreas
E)peptidases--villi of small intestine
51

When starch is broken down by pancreatic amylase, ____ will be formed.
A)glycerol + fatty acids
B)amino acids
C)peptides
D)maltose
E)glucose
52

When peptides are broken down by peptidases, ____ will be formed.
A)amino acids
B)fatty acids and glycerol
C)glucose
D)proteins
E)maltose
53

Which of the following substances is NOT a product formed in the small intestine?
A)glucose
B)maltose
C)amino acids
D)peptides
E)proteins
54

Which enzyme is missing in the small intestine if a person has lactose intolerance?
A)pancreatic amylase
B)dipeptidase
C)lipase
D)lactase
E)maltase
55

When fats are broken down by lipase, ____ will be formed.
A)amino acids
B)fatty acids and glycerol
C)glucose
D)proteins
E)maltose
56

Which of the following comparisons is NOT correct?
A)fats -- lipase
B)starch -- salivary amylase
C)maltose -- lactase
D)protein -- trypsin
E)peptides -- dipeptidases
57

Which of the following enzymes would NOT be used to break down spaghetti into its end products for absorption?
A)salivary amylase
B)pancreatic amylase
C)maltase
D)lipase
58

Five test tubes, listed below, were incubated at body temperature for one hour. Which of the following test tubes would have the appropriate environmental conditions for digestion to occur?
A)H2O + a small sliver of egg white (protein)
B)Pepsin + H2O + a small sliver of egg white
C)HCl + H2O + a small sliver of egg white
D)Pepsin + HCl + H2O + a small sliver of egg white
E)Pepsin + NaOH + H2O + a small sliver of egg white
59

Five test tubes, listed below, were incubated at body temperature for one hour. Which of the following test tubes would be considered the control?
A)H2O + a small sliver of egg white (protein)
B)Pepsin + H2O + a small sliver of egg white
C)HCl + H2O + a small sliver of egg white
D)Pepsin + HCl + H2O + a small sliver of egg white
E)Pepsin + NaOH + H2O + a small sliver of egg white
60

Which of the following statements is NOT correct about protein nutrition?
A)Foods rich in protein include red meat, fish, poultry, dairy products, legumes, nuts, and cereals.
B)Ordinarily, amino acids are not used as an energy source but are incorporated into structural proteins.
C)Each vegetable or grain alone is an incomplete protein source.
D)Because some amino acids are not produced in the body, a daily supply is needed.
E)We should derive all of our dietary protein from meat.
61

The quickest, most readily available source of energy for the body is ____.
A)protein
B)carbohydrate
C)lipid
D)vitamins
E)minerals
62

Which of the following is NOT considered to contain simple carbohydrates?
A)regular (non-diet) soft drinks
B)ice cream
C)candy
D)bread
63

Some dieticians label _____ as "empty calories."
A)simple carbohydrates
B)complex carbohydrates
C)fats
D)essential amino acids
E)proteins
64

Which of the following types of food may reduce the risk of colon cancer?
A)simple carbohydrates
B)polyunsaturated fats
C)fiber
D)cholesterol
E)protein
65

Which of the following statements is NOT correct?
A)High-density lipoprotein (HDL) carries cholesterol from cells to the liver.
B)Low-density lipoprotein (LDL) protects against the development of clogged arteries.
C)A diet low in saturated fat and cholesterol decreases the blood cholesterol level in some individuals.
D)White fish, poultry, and shellfish are recommended protein sources to lower blood cholesterol levels; cheese, egg yolks, and liver are not.
E)Soluble fiber is believed to combine with cholesterol in the digestive tract and carry it out of the body.
66

____ are organic compounds (other than carbohydrate, fat, and protein) that the body is unable to produce but uses for metabolic purposes.
A)High-density lipoproteins
B)Low-density lipoproteins
C)Minerals
D)Vitamins
E)Soluble fibers
67

Which vitamin is a part of the coenzyme NAD?
A)vitamin D
B)riboflavin
C)niacin
D)vitamin K
E)vitamin A
68

Citrus fruits and other fresh fruits and vegetables are natural sources of ____.
A)vitamin A
B)vitamin C
C)vitamin D
D)vitamin B
69

Sunshine and irradiated milk are primary sources of ____.
A)vitamin A
B)vitamin C
C)vitamin D
D)vitamin B
70

Too much of ____ can cause kidney stones.
A)vitamin C
B)vitamin A
C)vitamin B
D)vitamin D
E)niacin
71

Vitamin D deficiency can lead to ____.
A)scurvy
B)fissures of lips
C)dermatitis
D)rickets (decalcification and weakening of bone)
72

Vitamin C deficiency can lead to ____.
A)scurvy
B)fissures of lips
C)dermatitis
D)rickets
73

Which of the following is NOT considered a macromineral?
A)sodium
B)magnesium
C)potassium
D)calcium
E)iron
74

Which of the following macrominerals is needed for the construction of bones and teeth and for nerve conduction and muscle contraction?
A)sodium
B)magnesium
C)potassium
D)calcium
E)chlorine
75

Which of the following statements is NOT correct in regards to calcium and bone disease?
A)Osteoporosis affects more older women than men.
B)In osteoporosis, the bones break easily because they lack sufficient calcium.
C)Calcium supplements and estrogen help prevent osteoporosis.
D)In older individuals, osteoblasts are more active than osteoclasts.
76

Which of the following statements is NOT correct about dieting?
A)Weight loss occurs if the caloric intake is reduced while the same level of activity is maintained.
B)The best way to lose weight is to modify behavior and to lose the weight rapidly.
C)Physical activity firms up the body, puts you in the mood to keep the weight off, and burns calories.
D)Heavy individuals may have many more fat cells than normal, and dieting merely causes the fat cells to get smaller.
E)In order to keep unwanted pounds off, a long-term program should include regular exercise and a balanced diet that avoids fatty foods.
77

Which of the following disorders is characterized by an individual that is extremely thin but still claims to "feel fat"?
A)obesity
B)bulimia
C)anorexia nervosa
D)rickets
E)pellagra
78

Which of the following disorders is characterized by an individual who has the habit of eating to excess and then purging by vomiting?
A)obesity
B)bulimia
C)anorexia nervosa
D)rickets
E)pellagra
79

High-density lipoproteins protect you more from clogged arteries more than low-density lipoproteins.
A)True
B)False
80

High sodium intake has been linked to hypotension in some people.
A)True
B)False
81

Obesity is defined as a body weight of more than 20% above the ideal weight.
A)True
B)False
82

A nutrient is a substance in food that is used by the body for the maintenance of health.
A)True
B)False
83

A U.S.D.A.-recommended American diet emphasizes the importance of including grains in the diet and the desirability of eating fats, oils, and sweets sparingly.
A)True
B)False
84

Essential amino acids are those that are required in the diet because the body is unable to produce them.
A)True
B)False
85

It is necessary to maintain a constant level of glucose in the blood because brain cells cannot metabolize other energy sources.
A)True
B)False
86

Most of the calories in the diet come from carbohydrates.
A)True
B)False
87

Fats should be avoided in the diet.
A)True
B)False







Inquiry into Life, 11/eOnline Learning Center

Home > Chapter 14 > Multiple Choice Quiz