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Cambridge IGCSE Combined Science practice

What is the primary function of the atrial muscles?

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MCQ

Type

cambridge_mcq

Style

Topic

Heart

Exam-style question

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What is the primary function of the atrial muscles?.

  1. A.To pump blood to the body
  2. B.To contract and push blood into the ventricles
  3. C.To prevent backflow of blood
  4. D.To oxygenate the blood

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Paper 4 structured question: Heart

Paper 4Theory (Extended)3 marks

Description

Heart Function

The heart consists of four chambers and valves that regulate blood flow. The atria contract first, followed by the ventricles, ensuring efficient circulation.

  1. a

    Explain how the contraction of the atrial and ventricular muscles contributes to the heart's function.

    Aim for approximately 3 distinct marking points.

    [3]