Code: Class6-SC-08092026
Class: Class 6
Subject: EVS
Hard

Human Respiratory System

Question #2666
Which sequence correctly shows the path followed by air when it enters the human respiratory system?
a.
b.
c.
d.
Question #2667
What is the main function of the nose in the respiratory system?
a.
b.
c.
d.
Question #2668
Why are the lungs considered the main organs of the respiratory system?
a.
b.
c.
d.
Question #2669
The tiny air sacs present inside lungs where gas exchange occurs are called:
a.
b.
c.
d.
Question #2670
What happens when the diaphragm moves downward during breathing?
a.
b.
c.
d.
Question #2671
Which structure prevents food from entering the windpipe while swallowing?
a.
b.
c.
d.
Question #2672
Why is breathing essential for humans?
a.
b.
c.
d.
Question #2673
Which statement correctly describes the role of the trachea?
a.
b.
c.
d.
Question #2674
During exhalation, which change occurs inside the respiratory system?
a.
b.
c.
d.
Question #2675
Why do lungs contain millions of alveoli instead of only a few large air spaces?
a.
b.
c.
d.
Question #2676
Which organ system works most closely with the respiratory system to transport oxygen throughout the body?
a.
b.
c.
d.
Question #2677
What is the main reason humans breathe faster during exercise?
a.
b.
c.
d.
Question #2678
Which of the following protects the lungs from damage by dust particles and harmful substances?
a.
b.
c.
d.
Question #2679
What happens to oxygen after it reaches the alveoli?
a.
b.
c.
d.
Question #2680
Which part of the respiratory system connects the throat with the lungs?
a.
b.
c.
d.
Question #2681
Why does the right lung have three lobes while the left lung has two lobes?
a.
b.
c.
d.
Question #2682
Which gas is removed from the body when we breathe out?
a.
b.
c.
d.
Question #2683
What would most likely happen if the alveoli were damaged?
a.
b.
c.
d.
Question #2684
Which muscle plays an important role in changing the size of the chest cavity during breathing?
a.
b.
c.
d.
Question #2685
A person living in a polluted area may develop breathing problems mainly because:
a.
b.
c.
d.
Question #2686
Which statement best explains the difference between breathing and respiration?
a.
b.
c.
d.
Question #2687
Which part of the respiratory system contains rings of cartilage that prevent it from collapsing?
a.
b.
c.
d.
Question #2688
Why are the walls of alveoli very thin?
a.
b.
c.
d.
Question #2689
What is the correct role of bronchi in the respiratory system?
a.
b.
c.
d.
Question #2690
If a persons breathing becomes very shallow, which body function may be affected first?
a.
b.
c.
d.
Question #2691
Which sequence correctly describes what happens during inhalation?
a.
b.
c.
d.
Question #2692
Why does the human respiratory system need a continuous supply of oxygen?
a.
b.
c.
d.
Question #2693
Which organ prevents harmful particles from directly reaching deeper parts of the respiratory system?
a.
b.
c.
d.
Question #2694
A student notices that breathing becomes difficult when running at high speed. The most likely reason is:
a.
b.
c.
d.
Question #2695
Which statement shows the importance of a healthy respiratory system?
a.
b.
c.
d.
Score: 0/30
Accuracy: 0%
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