Biology 9700 · AS & A Level · The heart

The heart — practice question

One kind of congenital heart defect is one in which the left and right atria are not fully separated. This condition is known as an atrial septal defect (ASD). ASD commonly causes blood to pass from the left atrium to the right atrium. As a result, the blood pressure in the right atrium increases and the blood pressure in the left atrium decreases. Which row shows the other effects of ASD?

  • Ablood pressure in pulmonary artery: decreased; blood pressure in aorta: increased; % oxygenation of blood in pulmonary artery: decreased
  • Bblood pressure in pulmonary artery: decreased; blood pressure in aorta: increased; % oxygenation of blood in pulmonary artery: increased
  • Cblood pressure in pulmonary artery: increased; blood pressure in aorta: decreased; % oxygenation of blood in pulmonary artery: decreased
  • Dblood pressure in pulmonary artery: increased; blood pressure in aorta: decreased; % oxygenation of blood in pulmonary artery: increased

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI