Multiple choice

Which of the following is/are the pace setter(s) of the human heart?

  1. Atrioventricular bundle

  2. Papillary muscles

  3. Purkinje fibres

  4. SA node

  5. AV node

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The sinoatrial (SA) node is a section of nodal tissue that is located in the upper wall of the right atrium. The SA node is also referred to as the pacemaker of the heart.