Name: Class: Date given:
Gas Exchange System
P is
Q is
R is
1 Label P, Q and R on the diagram above.
. [3]
2. The diagram above shows a piece of apparatus which can be used to model the mechanism of
the gas exchange system. Explain how the parts of the gas exchange system control breathing.
[4]
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Gas Exchange
System
3. Use the diagram above to explain how the volume
of a person’s lungs can be measured. [3]
4. Explain how smoking can damage the gas exchange system, and the effect this has on a person.
[4]
5. For each statement below, write whether it is true or false.
[4]
When you exercise you breathe faster
When you exercise you need less energy
After exercise, breathing returns to normal immediately
During exercise the breathing rate is decreased
6. What is asthma?
[2]
Learning Outcomes (tick if achieved)
Q1,2 I can describe the structure and function of the gas exchange system
Q3 I can describe how lung volume is measured
Q4 I can explain how smoking affects the gas exchange system
Q5 I can explain how exercise affects the gas exchange system
Q6 I know what asthma is
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Gas Exchange System Answers
1
.
P is trachea (windpipe)
Q is alveoli
R is diaphragm
2. The diagram above shows a piece of apparatus which can be used to model the mechanism of
the
gas exchange system. Explain how the parts of the gas exchange system control breathing. [4]
Max 4 from:
• The diagram contracts / moves down
• Lungs get bigger / expand / capacity increases
• Inhale / air drawn into lungs / breathing in
•
The diaphragm relaxes / moves up
•
Lungs get smaller / compressed / capacity decreases
•
Exhale / air pushed out / breathing out
Gas Exchange System Answers
3. Use the diagram above to explain how the volume of a person’s lungs can be measured. [3]
Max 3 from:
• Air breathed out / exhaled through tube
• Air forces water from the bottle / water is displaced
• Air bubble / amount of air measured by volume
• After deep breath the air in bottle is equal to capacity of lungs
4. Explain how smoking can damage the gas exchange system, and the effect this has on a person.
[4]
Max 4 from:
• Harder to breathe / shortness of breath
• Causes coughing / wheezing
• Tar builds up Blocked
• airways Alveoli
• damaged
• Surface area for gas exchange reduced Less
• oxygen into body
• Heart works harder to compensate / can lead to heart attack
• Can cause lung cancer
5. For each statement below, write whether it is true or false.
[4]
When you exercise you breathe faster True
When you exercise you need less energy False
After exercise, breathing returns to normal immediately False
During exercise the breathing rate is decreased False
6. What is asthma? [2]
A condition which makes breathing harder / difficulty with
breathing Usually an allergic reaction (to e.g. pet hair, dust)
