AQA A Level · Physical Education 7582

Cardiovascular system: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Cardiovascular system.

10 questions21 marksFree, no account

Question 1

1 mark

Which energy system provides the majority of adenosine triphosphate (ATP) during a single maximal effort lasting less than 6 seconds, such as a standing long jump?

Question 2

1 mark

In the cardiac conduction system, what is the correct order of the pathway taken by an electrical impulse to cause ventricular contraction?

Question 3

1 mark

Which of the following best describes the physiological state of Excess Post-exercise Oxygen Consumption (EPOC) and its relationship to the 'slow' component of recovery?

Question 4

1 mark

According to Starling’s law of the heart, what is the primary factor that causes an increase in stroke volume during exercise?

Question 5

1 mark

During exercise, oxygen must diffuse from the blood into the working muscle cells. Which of the following conditions at the muscle site facilitates this diffusion?

Question 6

2 marks

Identify the venous return mechanism consisting of one-way structures within the veins that prevent the backflow of blood as it travels from the lower extremities towards the heart.

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Question 7

4 marks

A sports scientist measures an endurance runner's Respiratory Exchange Ratio (RER) during a steady-state run. The recorded value is exactly \(0.70\).

Identify the primary fuel source being utilized and explain what this value indicates regarding the relative volumes of \(VCO_{2}\) produced and \(VO_{2}\) consumed.

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Question 8

2 marks

Identify the specific joint action and the main agonist muscle occurring at the ankle during the upward phase of a calf raise.

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Question 9

3 marks

(a) Define the term stroke volume.

(b) A sedentary individual has a resting heart rate of \(72\) beats per minute and a stroke volume of \(70\,ml\). Calculate their resting cardiac output (\(Q\)) in litres per minute (\(L/min\)).

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Question 10

5 marks

A marathon runner is competing on a hot, humid day. During the latter stages of the race, their stroke volume begins to decrease despite maintaining a constant exercise intensity.

(a) Identify this physiological phenomenon and explain why stroke volume decreases in these conditions.

(b) In order to maintain a constant cardiac output (\(Q\)), explain the necessary change in heart rate and identify the relationship used to calculate cardiac output.

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