PrepRung
Sign inSign up free

NDA 2019 GAT · General Knowledge · Human Physiology · medium

The natural pacemaker of the human heart is the

Single correct option

The natural pacemaker of the human heart is the
  1. A. atrioventricular node
  2. B. bundle of His
  3. C. mitral valve
  4. D. sino-atrial node
Show answer and solution

Answer: (D) sino-atrial node

The sino-atrial node, situated in the wall of the right atrium, generates the electrical impulses that set the rhythm of heartbeat. The impulse then passes to the atrioventricular node and the bundle of His. The mitral valve is a structure that controls blood flow rather than a source of impulses.
Report a mistake

Original question written in the NDA 2019 GAT pattern and checked twice for the correct answer. Not an official question paper. How we write and check questions · Corrections policy · Report a mistake