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8Cb Gas exchange
By Katie Bruce
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Last updated 5 months ago
12 questions
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Question 1
1.
Explain why air moves out of the lungs. Make reference to the ribcage and muscles involved.
Question 2
2.
Why do humans need a gas exchange system?
To provide oxygen for respiration and remove carbon dioxide
To pump blood around the body
To break down food into smaller molecules
To cool the body down
Question 3
3.
Where does respiration take place in the human body?
Only in the lungs
Only in the heart
In every single cell
Only in the muscles
Question 4
4.
Which two gases are exchanged in the lungs?
Oxygen and nitrogen
Carbon dioxide and oxygen
Oxygen and hydrogen
Carbon dioxide and methane
Question 5
5.
What is the main function of the alveoli in the lungs?
To digest food
To store oxygen
To allow gas exchange between the air and the blood
To pump blood around the body
Question 6
6.
How does oxygen get from the alveoli into the blood?
It is pumped by the heart
It dissolves in water and moves through the skin
It diffuses through the thin walls of the alveoli into the blood
It is pushed into the blood by the diaphragm
Question 7
7.
What happens to the carbon dioxide in the blood when it reaches the lungs?
It is used by the alveoli to make energy
It diffuses out of the blood and into the air in the alveoli
It is converted into oxygen
It stays in the blood to help with respiration
Question 8
8.
Why do humans breathe more heavily when they exercise?
The lungs need to store more oxygen
The body needs more oxygen for respiration, and more carbon dioxide must be removed
The body needs to get rid of extra water
The lungs expand to make space for more air
Question 9
9.
Which part of the blood carries oxygen from the lungs to the rest of the body?
White blood cells
Platelets
Red blood cells
Plasma
Question 10
10.
What happens to the oxygen once it reaches the body’s cells?
It is used for respiration to release energy
It is stored in the cells for later use
It turns into carbon dioxide immediately
It is turned into food
Question 11
11.
Why is the gas exchange system important for survival?
It provides the oxygen needed for respiration to release energy
It helps in digesting food
It removes nitrogen from the body
It controls body temperature
Question 12
12.
1. _______ 2._______ 3._______ 4._______5. _______6. _______7. _______8. _______ 9._______10. _______ 11._______