Human Body: Organ Systems Test 2

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Human Body: Organ Systems Test 2

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Weekly Quiz Competition

Question 1
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Abhishek blew hard on a mirror surface. He observed that the mirror became misty because of tiny water droplets that formed on the mirror. What can he conclude from this activity?

A
Carbon dioxide is given off when we exhale,

B
Oxygen is given off when we exhale.

C
Water vapours are given off when we exhale.

D
None of these

Solution

Water vapours are given off when we exhale.

Water vapour, water vapour or aqueous vapour is the gaseous phase of water.
Question 2
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Substances abundant in the dull, purplish-red blood in the veins are _____.
(a) Nutrients
(b) Oxygen
(c) Carbon dioxide
(d) Waste materials

A
(a) and (b) only

B
(b) and (d) only

C
(a) and (c) only

D
(c) and (d) only
Solution
- Circulatory system consists of blood vessels and heart.
- Blood vessels are of two types - arteries and veins.
- Arteries carry blood rich in nutrients and oxygen to all body parts while veins collect blood rich in carbon dioxide and waste materials from the body parts and carry it back to the heart.
Question 3
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The given figure shows the human digestive system. In which labelled part food is both masticated and partially digested?

A
P

B
Q

C
R

D
S

Solution

Food is masticated with teeth and partially digested by the action of salivary juices in the mouth (P).
Question 4
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Sameer uses dumbbell to exercise. Which body systems are involved in bending and straightening of the arm?

A
Muscular and Excretory systems

B
Digestive and Nervous systems

C
Muscular and Skeletal systems

D
Skeletal and Reproductive systems
Solution
- In bending and straightening of the arms, both muscles (muscular system) and bones (skeletal system) are involved.
- These two systems work in close co-ordination and cause all the body movements.
Question 5
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What happens when we touch a hot kettle?

A
Skin → Nerves → Hand is pulled back

B
Skin → Nerves → Spinal cord → Nerves → Hand is pulled back

C
Skin → Brain → Nerves → Hand is pulled back

D
None of these

Solution

When we touch a hot kettle with our hand, our skin sends message to the spinal cord through nerves, and here the message is processed is sent again to the hand (skin) through nerves to pull back.
Question 6
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Study the given diagram,

Which of the following represents the small intestine?

A
W

B
X

C
Y

D
Z

Solution

Small intestine is an organ of digestive system where complete digestion of food occurs and the digested food nutrients are absorbed into blood and sent to all body parts.
Question 7
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Beena, Shalu and Navpreet wanted to find out who among them had the biggest lung capacity. They decided to blow into a balloon with one breath and see how big it will become. Which of the following factors they must keep the same to make the test a fair one?

1. Colour and design pattern of the balloon
2. Size and shape of the balloon
3. When to breathe in forcibly before blowing
4. Material, balloon is made of

A
1 and 2 only

B
2 and 3 only

C
1, 3 and 4 only

D
2, 3 and 4 only
Solution
- Final size of the balloon after blowing air will depend on initial size, shape and material of the balloon, thus these should be kept same.
- Colour and design pattern have no effect on it.
- Breathing in forcibly before blowing will increase the amount of air blowed out hence all of them should breathe in before blowing.
Question 8
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Read the given statements made by four students.
Priya: I love the smell of wet soil after rains.
Shruti: My hair feel so rough after using this new shampoo.
Om: Watch out! You can slip on this banana peel.
Sam: I just love the musical sound made by wind chymes hanging at the door of my living room.
Now, select the correct option regarding this.

A
Priya used the sense which helps us to choose a good perfume.

B
Shruti used the sense which helps us to identify a red and a blue object.

C
Om used the sense which helps us to respond to a phone's ring.

D
Sam used the sense which helps to differentiate between a hot and a cold coffee.
Solution
- Priya, Shruti, Om and Sam used the senses of smell, touch, sight and hearing, respectively.
- Sense of smell helps us to choose a good perfume.
Question 9
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The given picture shows two organ systems of our body, X and Y. Select the correct statement about these systems.

A
System X helps in movement while system Y helps body to get rid of wastes.

B
System X and Y work together to help body to move.

C
System X supplies blood to different body parts while system Y helps to produce babies.

D
None of these
Solution
- The system X is skeletal system while the system Y is muscular system.
- These two systems work together to help body to perform movements.
Question 10
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Select the correct option regarding the organ system shown here.

A
If part P is removed, food will not be masticated and absorbed.

B
If part Q is removed, water from food will not be absorbed.

C
If part R is removed, complete digestion of all food components will not take place.

D
None of these
Solution
- In the given figure, P is stomach, Q is small intestine and R is large intestine.
- Churning and partial digestion of food takes place in stomach.
- Complete digestion of all food components and their absorption into blood takes place in small intestine.
- Major absorption of water takes place in large intestine.