The intrinsic ability of cardiac muscle to generate action potentials (APs) rhythmically is achieved by the normal pace maker,the sino-atrial node (S-A).The S-A node is part of the special excitatory and conductive system of cardiac muscle.with the help of a diagram, describe this conductive system how the AP spreads throughout the muscle.

Answer 1

The conductive system of cardiac muscle consists of specialized cells that are responsible for initiating and transmitting action potentials (APs) throughout the heart. This system ensures coordinated contraction of the heart muscle, allowing it to pump blood effectively.

One of the key components of the conductive system is the sino-atrial node (S-A node), which serves as the natural pacemaker of the heart. The S-A node is located in the right atrium near the opening of the superior vena cava. It is comprised of a cluster of specialized cells that possess automaticity, meaning they can spontaneously generate action potentials.

To visualize the conductive system and the spread of action potentials throughout the cardiac muscle, please refer to the attached diagram.