Free Human Body 02 Practice Test - 4th Grade 

Question 1

Which of the following is a function of saliva?

A. Helps you to digest food.
B. Helps you to smell food.
C. Helps you to talk.
D. Helps you to hear.

SOLUTION

Solution : A

Saliva is a watery secretion in the mouth produced by the salivary glands that aids in the digestion and swallowing of food. Saliva also serves in moistening and tasting the food. It also kills the germs that are present in the food.

Question 2

Which of the following part is found in the inner ear?

A.

Cochlea

B.

Stirrup

C.

Eardrum

D.

Iris

SOLUTION

Solution : A

The ear is made up of 3 parts - outer, middle and the inner ear. The cochlea is found in the inner ear. The stirrup and eardrum are found in the middle ear. Iris is found in the eye. 

Question 3

The little bumps on your tongue are called:

A. Taste buds
B. Papillae
C. Pores
D. Pimples

SOLUTION

Solution : B

The little bumps on the tongue are called papillae. These contain the taste buds that give us the sensation of taste. 

Question 4

Molars are rounded teeth and used for grinding food. 

A.

True

B.

False

SOLUTION

Solution : A

The molars are large, flat teeth at the back of the mouth. They are used primarily to grind food during chewing. 

Question 5

The stirrup is the smallest bone in the body.

A.

True

B.

False

SOLUTION

Solution : A

Yes, it is the smallest bone present in the body. It is located in the inner ear.

Question 6

A thin, transparent and flexible membrane in ear is known as:

A.

Ear lobe

B.

Ear canal

C.

Eardrum

D.

Pinna

SOLUTION

Solution : C

Vibration of ear drum by the sound help us to hear it.

Question 7

The iris controls the amount of light entering the eye.

A.

True

B.

False

SOLUTION

Solution : A

Yes, Iris is responsible for the amount of light entering into the eye. It has two pairs of sphincter muscles which adjust the size of the lens depending amount the intensity of light that we are facing.

Question 8

The cochlea is a part of the ___.

A.

middle ear

B.

inner ear

C.

outer ear

D.

pinna

SOLUTION

Solution : B

The cochlea is the part of the inner year. It is spiral in shape like a snail. It contains a cochlear liquid which stirs by stirrup which starts moving when the eardrum vibrates.

Question 9

Which of the following tastes sour?

A.

B.

C.

D.

SOLUTION

Solution : B

Out of the options, lemon tastes sour. It is because of the citric acid present in it. Chocolate, banana and coffee taste sweet.

Question 10

The sense of smell is dependent on  ___ cells.

A.

Optic

B.

Olfactory

C.

Rod

D.

Cone

SOLUTION

Solution : B

The sense of smell is dependent on Olfactory cells. These are present under a small bundle which is known as Olfactory Epithelium.

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