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WorksheetsCH 30 DIGESTION
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
Into which parts of the human digestive system are digestive enzymes secreted?
a)
mouth, esophagus, stomach
b)
stomach, small intestine, large intestine
c)
mouth, stomach, small intestine
d)
esophagus, stomach, large intestine
2.
In humans, structures that release digestive secretions directly into the small intestine include both the
a)
salivary glands and the pancreas
b)
gall bladder and the lacteals
c)
villi and the salivary glands
d)
pancreas and the gall bladder
3.
In the human body, hydrochloric acid is responsible for the low pH of the contents of the
a)
lungs
b)
kidney
c)
liver
d)
stomach
4.
Extensive damage to the large intestine would have the greatest effect on
a)
glucose metabolism
b)
protein synthesis
c)
enzyme secretion
d)
water reabsorption
5.
Which organ is the initial site of the extracellular chemical digestion of proteins?
a)
A
b)
B
c)
E
d)
D
6.
What occurs during the digestion of proteins?
a)
Specific enzymes break down proteins into amino acids.
b)
Specific hormones break down proteins into simple sugars.
c)
Specific hormones break down proteins into complex starches.
d)
Specific enzymes break down proteins into simple sugars.
7.
Which activity normally occurs in the esophagus of a human?
a)
hydrolysis of protein
b)
process of peristalsis
c)
secretion of amylase
d)
absorption of cellulose
8.
In which human digestive organ do proteases function?
a)
mouth
b)
esophagus
c)
gall bladder
d)
stomach
9.
Which process is illustrated in the diagram?
a)
circulation
b)
absorption
c)
peristalsis
d)
ingestion
10.
Bile is a secretion which aids in the digestion of
a)
lipids
b)
proteins
c)
saccharides
d)
starches
11.
Feces is usually about 40 percent water and 60 percent solid matter. Reducing the water content to 20 percent would most likely result in
a)
ulcers
b)
appendicitis
c)
diarrhea
d)
constipation
12.
Which substance is a nutrient in the human diet?
a)
oxygen
b)
carbon dioxide
c)
water
d)
roughage
13.
In humans, villi that absorb monosaccharides and amino acids are found within the
a)
stomach
b)
small intestine
c)
pancreas
d)
esophagus
14.
In addition to water, the principal components of urine are
a)
amino acids and fatty acids
b)
urea and salts
c)
ammonia and bile
d)
hydrochloric acid and bases
15.
Which components of the human diet contain the greatest amounts of sugars and starches?
a)
meat and eggs
b)
fruits and vegetables
c)
minerals and milk
d)
water and vitamins
16.
Which type of digestion occurs in the mouth when an individual chews a piece of bread?
a)
mechanical digestion, only
b)
chemical digestion, only
c)
both mechanical and chemical digestion
d)
neither mechanical nor chemical digestion
17.
Which nutrient should provide the largest percentage of calories in a well-balanced diet?
a)
carbohydrates
b)
incomplete proteins
c)
saturated fats
d)
water
18.
A disorder of the digestive system that can cause severe dehydration is known as
a)
appendicitis
b)
gallstones
c)
constipation
d)
diarrhea
19.
The principal function of structure x is to
a)
produce salivary enzymes
b)
secrete sex hormones
c)
absorb water
d)
digest bile
20.
Enzymes and acidic juices in the stomach, which break proteins down into smaller molecules, is known as
a)
circulation
b)
chemical digestion
c)
excretion
d)
mechanical digestion
21.
All of the following are organs of the digestive system except
a)
the stomach
b)
the mouth
c)
the intestines
d)
the heart
22.
If a person was unable to break down food particles into molecules that could be absorbed by the body, you would predict
a)
there is a malfunction with the digestive system
b)
there is a malfunction with the excretory system
c)
there is a malfunction with the reproductive system
d)
there is a malfunction with the circulatory system
23.
In gastric bypass surgery, the stomach is reduced to hold 1 ounce of food, instead of 3 pints. This surgery would drastically impact one's
a)
excretory system
b)
digestive system
c)
circulatory system
d)
respiratory system
24.
Which molecule can diffuse from the digestive tract into the human bloodstream without first being digested?
a)
protein
b)
starch
c)
fat
d)
glucose
25.
Before starch can enter a cell, it must be
a)
absorbed by simple sugars
b)
diffused into simple sugars
c)
digested to form simple sugars
d)
actively transported by simple sugars
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