Which part of the breathing system is represented by the glass tube?
Tick (✓) one box - AQA - GCSE Biology - Question 6 - 2021 - Paper 1
Question 6
Which part of the breathing system is represented by the glass tube?
Tick (✓) one box.
Alveoli
Capillaries
Lung
Trachea
Give two reasons why the teacher is correct.... show full transcript
Worked Solution & Example Answer:Which part of the breathing system is represented by the glass tube?
Tick (✓) one box - AQA - GCSE Biology - Question 6 - 2021 - Paper 1
Step 1
Which part of the breathing system is represented by the glass tube?
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Answer
The part of the breathing system represented by the glass tube is the trachea.
Step 2
Give two reasons why the teacher is correct.
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Answer
The glass tube is not flexible, which is characteristic of the trachea.
The glass tube allows air to pass through, similar to how the trachea functions in the respiratory system.
Step 3
Give two variables the scientist controlled in the investigation.
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Answer
The speed of the treadmill.
The type of exercise (ensuring all were running).
Step 4
Calculate the percentage increase in the man's breathing rate between 0 minutes and 8 minutes.
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Answer
Using the data:
0 minutes = 20 breaths per minute
8 minutes = 42 breaths per minute
Using the formula:
extpercentageincrease=20(42−20)×100
Calculating this gives:
percentage increase=2022×100=110%
Step 5
Explain why the man's breathing rate increased when he was running.
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Answer
The man's breathing rate increased when he was running to provide more oxygen to his muscles. During exercise, the demand for oxygen rises to meet the energy requirements of the muscles. Therefore, the body increases the breathing rate to facilitate greater oxygen intake and improve performance.
Step 6
Give one measurement that could be taken to show a different effect of exercise on the body.
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Answer
One measurement could be the heart rate, which indicates how hard the heart is working during exercise.
Step 7
Give one effect that smoking can have on the body.
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Answer
One effect of smoking can be an increased risk of lung cancer.
