WorksheetsDigestive system
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
Select the correct order of the four steps of the digestive system (from start to finish):
a)
a. elimination, absorption, ingestions, digestion
b)
b. ingestion, absorption, digestion, elimination
c)
c. elimination, ingestion, absorption, digestion
d)
d. ingestion, digestion, absorption, elimination
2.
Which of the following is an example of mechanical digestion?
a)
a. saliva breaking down starches in the mouth
b)
b. chewing food
c)
c. bile breaking down lipids
d)
d. A and C
3.
Which of the following is an example of chemical digestion?
a)
a. chewing food
b)
b. enzymes breaking down food into small molecules the body can use
c)
c. saliva breaking down starches in the mouth
d)
d. B and C
4.
Which of the the following organs plays the biggest role in absorbing the nutrients found in foods we eat?
a)
a. mouth
b)
b. large intestine
c)
c. small intestine
d)
d. stomach
5.
Which of the following describes the role of saliva in the digestive system:
a)
a. to moisten and lubricate chewed food so it can easily be swallowed
b)
b. to begin chemically digesting food with the enzyme amylase
c)
c. to absorb the proteins present in foods
d)
d. A and B
6.
the enzyme amylase serves to:
a)
a. break down the bonds of proteins
b)
b. break the chemical bonds in starches, forming sugars
c)
c. A and B
d)
d. process lactose present in dairy products
7.
Once food has been chewed, it then moves into the:
a)
a. stomach
b)
b. esophagus
c)
c. small intestine
d)
d. bolus
8.
another name for food that has been chewed and combined with saliva is:
a)
a. booger
b)
b. bolus
c)
c. chyme
d)
d. villi
9.
food moves down the esophagus and through the stomach through which of the following processes?
a)
a. the contractions of the muscles smooth muscles known as peristalsis
b)
b. gravitational forces
c)
c. bile softens food so it can fall into the stomach
d)
d. B and C
10.
pepsin is:
a)
a. an enzyme found in the stomach
b)
b. an enzyme responsible for the break down of proteins into smaller polypeptide fragments
c)
c. a protein
d)
d. all of the above
11.
Pepsin works best in which of the following environments:
a)
a. basic environment
a. basic environment
a. basic environment
b)
b. acidic environment
c)
c. neutral environment
d)
d. pepsin works despite what kind of environment it is in
12.
What kind of acid is produced by stomach glands to optimize chemical digestion?
a)
a. sulfuric acid
b)
b. hydrofluoric acid
c)
c. hydrochloric acid
d)
d. B and C
13.
Which of the following best describes the pH level inside the human stomach?
a)
a. 1
b)
b. 14
c)
c. 7
d)
d. the human stomach does not have pH
14.
What kinds of digestion occur in the stomach?
a)
a. only mechanical digestion
a. only mechanical digestion
b)
b. mechanical and chemical digestion
c)
c. only chemical digestion
d)
d. depends on what kind of food you eat
15.
What is the churned and chemically digested mixture that leaves the stomach to enter the small intestine called?
a)
a. bolus
b)
b. villi
c)
c. chyme
d)
d. gross
16.
Which of the following is not a function of the pancreas?
a)
a. to churn the food into a smooth paste
b)
b. to regulate blood sugar levels
c)
c. to produce enzymes that break down carbohydrates, proteins, lipids, and nucleic acids
d. to produce sodium bicarbonate to neutralize stomach acid
d. to produce sodium bicarbonate to neutralize stomach acid
17.
The liver produces which of the following?
a)
a. sodium bicarbonate
b)
b. amylase
c)
c. bile
d)
d. A and C
18.
bile is produced in the _________, but stored in the __________.
a)
a. liver, pancreas
b)
b. gall bladder, pancreas
c)
c. liver, gall bladder
d)
d. stomach, gall bladder
19.
The purpose of bile is to:
a)
a. churn food into a smooth paste
b)
b. break down large, indigestible globs of fat into smaller, more processable globs
c)
c. break down large, complex proteins into their essential amino acid form
d)
d. B and C
20.
Lipase breaks down:
a)
a. complex carbohydrate
b)
b. lipids
c)
c. starches
d)
d. nucleic acids
100 %
