Biology 9700 · AS & A Level · The heart

The heart — practice question

Which row gives the correct description of the events that occur during the cardiac cycle?

  • Anerve impulses from atrio-ventricular node (AVN) to SAN; nerve impulses from Purkyne tissue (PT) to the ventricles; nerve impulses from sino-atrial node (SAN) to AVN
  • Bnerve impulses from atrio-ventricular node (AVN) to PT; nerve impulses from Purkyne tissue (PT) to the atria; nerve impulses from sino-atrial node (SAN) to PT
  • Cnerve impulses from atrio-ventricular node (AVN) to PT; nerve impulses from Purkyne tissue (PT) to the ventricles; nerve impulses from sino-atrial node (SAN) to AVN
  • Dnerve impulses from atrio-ventricular node (AVN) to SAN; nerve impulses from Purkyne tissue (PT) to the atria; nerve impulses from sino-atrial node (SAN) to PT

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