Identify the chambers of the heart labelled X and Y in Figure 3 - AQA - GCSE Physical Education - Question 10 - 2020 - Paper 1
Question 10
Identify the chambers of the heart labelled X and Y in Figure 3.
X
Y
What is the role of Z in Figure 3?
Complete the formula for cardiac output.
Cardiac output ... show full transcript
Worked Solution & Example Answer:Identify the chambers of the heart labelled X and Y in Figure 3 - AQA - GCSE Physical Education - Question 10 - 2020 - Paper 1
Step 1
Identify the chambers of the heart labelled X and Y in Figure 3.
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Answer
X: Left ventricle
Y: Right atrium
Step 2
What is the role of Z in Figure 3?
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Answer
Z carries (oxygenated) blood away from the heart.
Step 3
Complete the formula for cardiac output.
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Answer
Cardiac output (Q) = Stroke volume × Heart rate.
Step 4
Explain what is happening to the heart rate before exercise in Figure 4.
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Answer
Prior to exercise, the heart rate begins to increase. This is known as the anticipatory rise and is caused by the release of the hormone adrenaline.
Step 5
What is the intensity of exercise at point A in Figure 4?
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Answer
Steady state/submaximal.
Step 6
Explain how vasodilation helps to direct blood flow when we exercise.
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Answer
Vasodilation widens blood vessels or arteries, allowing increased blood flow to the working muscles.
