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Digestive System

Total questions: 40

Worksheet time: 1hrs 4mins

Name
Class
Date
1.

Which of the following correctly describes the purpose of digestion?

a)

To break down complex food molecules into simple soluble molecules

b)

To make complex food molecules from simple soluble molecules

c)

To make use of simple soluble food molecules

d)

To remove complex food molecules from the body

2.

Large food molecules need to be broken down to be small enough to pass through cell membranes.

a)

True

b)

False

3.

People in the Arctic region live in conditions where temperatures are as low as -40 °C. What should their diet be rich in, to adapt to these conditions?

a)

amino acids

b)

glucose

c)

fats

d)

vitamins

4.

Which statement is NOT true about proteins?

a)

Protein digestion begins in the mouth.

b)

Proteins are used for cell growth and repair.

c)

Proteins are broken down to form amino acids.

d)

Some complex proteins function as enzymes in the body.

5.

Which enzyme does the stomach produce?

a)

amylase

b)

lipase

c)

maltase

d)

protease

6.

Where is the digestion of food completed?

a)

liver

b)

large intestine

c)

stomach

d)

small intestine

7.

Why is the oesophagus muscular?

a)

To break the food into even smaller pieces

b)

To produce enzymes to digest food

c)

To push food from the mouth into the stomach

d)

To move the food back and forth in two directions

8.

Where does carbohydrate digestion begins?

a)

liver

b)

mouth

c)

oesophagus

d)

stomach

9.

Where does protein digestion begins?

a)

large intestine

b)

mouth

c)

small intestine

d)

stomach

10.

Where does fat digestion begins?

a)

colon

b)

liver

c)

small intestine

d)

stomach

11.

Select all the enzymes present in the intestinal juice.

a)

amylase

b)

lipase

c)

maltase

d)

protease

12.

Which of the following kills bacteria in the human alimentary canal?

a)

gastric juice

b)

mucus

c)

pancreatic juice

d)

saliva

13.

Which food is unsuitable for a person who cannot secrete enough bile?

a)

butter

b)

lean meat

c)

spinach

d)

rice

14.

What are the names of the products formed by action of lipase on small fat droplets?

(a)  

15.

What is the name of the product formed by action of maltase on maltose?

(a)  

16.

What is the name of the product formed by action of protease on polypeptides or smaller protein molecules?

(a)  

17.

Name the enzyme that acts on starch.

(a)  

18.

What colour will starch turn brown iodine solution into?

a)

blue-black

b)

colourless

c)

red

d)

yellow

19.

Which of the following is a physical digestion?

a)

Bile emulsifies fats into smaller fat droplets.

b)

Glucose formed by maltase in the small intestine.

c)

Protease breaks down the proteins.

d)

Salivary amylase mixes with starch in the mouth.

20.

Large carbohydrates are chemically digested into smaller _____ molecules

a)

proteins

b)

amino acids

c)

glucose

d)

enzymes

21.

Digestion begins in the ______.

a)

Mouth

b)

Stomach

c)

Small intestine

d)

Gallbladder

22.

Proteins are broken down into _______.

a)

Fatty acids

b)

Glycerol

c)

Glucose

d)

Amino acids

23.

The structure that keeps food from entering the trachea is called the _____________.

a)

Salivary gland

b)

Epiglottis

c)

Pharynx

d)

Esophagus

24.
What organ is this?
a)
stomach
b)
large intestine
c)
small intestine
d)
esophagus
25.

Which of the following kills bacteria in the human digestive system?

a)

Hydrochloric acid

b)

Mucus

c)

Amylase

d)

Pepsin

26.

Which of the following kills bacteria in the human digestive system?

a)

Hydrochloric acid

b)

Mucus

c)

Amylase

d)

Pepsin

27.

Which digestive organ is represented by the letter B?

a)

Pancreas

b)

Liver

c)

Mouth

d)

Small intestine

28.

Which food is unsuitable for a person who cannot secrete enough bile?

a)

butter

b)

lean meat

c)

spinach

d)

rice

29.

Where does protein digestion begin?

a)

mouth

b)

stomach

c)

small intestine

d)

large intestine

30.
The diagram represents human digestive system. From which structure are glucose and amino acids normally absorbed into the circulatory system?
a)
F - Large Intestine
b)
H - Liver
c)
C - Stomach
d)
E - Small Intestine
31.
What organ is this?
a)
stomach
b)
small intestine
c)
large intestine
d)
esophagus
32.

What is the name of the tissue that closes off the windpipe when you swollen so you do not choke?

a)

epiglottis

b)

esophagus

c)

ileum

d)

appendix

33.

The salivary glands in your mouth produce about 6 cups of saliva which helps contains enzymes to break down food as well as water to help with swallowing.

a)

TRUE

b)

FALSE

34.

You cannot live completely without this organ because it produces bile, stores glycogen and helps to detox the body. What is it?

a)

gall bladder

b)

liver

c)

pancreas

d)

ileum

35.

A common term that is used for the small and large intestines is bowels.

a)

TRUE

b)

FALSE

36.

Did you know that one third of your blood flows through this organ every minute. What is it?

a)

intestines

b)

liver

c)

stomach

d)

pharynx

37.
How does food move through your digestive system?
a)
by gravity pulling it down
b)
when we eat more food, it forces the rest down
c)
muscle movements called peristalsis
d)
electromagnetic force
38.

Large food molecules need to be broken down to be small enough to pass through cell membranes.

a)

True

b)

False

39.

Which enzyme does the stomach produce?

a)

amylase

b)

lipase

c)

maltase

d)

protease

40.

Which organ stores bile?

a)

stomach

b)

gallbladder

c)

pancreas

d)

liver

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