What is the primary function of the respiratory system?
The Respiratory System

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Other, Biology, Health Sciences
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11th Grade - University
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To digest food and absorb nutrients
To take in oxygen and expel carbon dioxide
To protect the body from infections
To circulate blood throughout the body
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do worms primarily exchange gases?
Through gills
Through spiracles
Through their skin
Through their lungs
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main advantage of countercurrent gas exchange in fish?
It allows fish to swim faster
It helps fish to breathe underwater without lungs
It increases the efficiency of oxygen extraction from water
It enables fish to survive in polluted waters
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary role of the alveoli in the human respiratory system?
To filter out dust and pollutants
To increase the surface area for gas exchange
To transport oxygen to the bloodstream
To produce surfactants
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the function of surfactants in the alveoli?
To prevent the alveoli from collapsing
To increase the surface area of the lungs
To transport oxygen to the blood
To filter out harmful particles
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How does the diaphragm contribute to breathing?
By filtering air before it enters the lungs
By contracting and relaxing to change lung pressure
By producing surfactants
By transporting oxygen to the bloodstream
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to carbon dioxide in the blood before it is exhaled?
It is absorbed by the alveoli
It is stored in the red blood cells
It is converted to bicarbonate
It is directly expelled from the blood
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