Describe the purpose of the Bundle of His.

The Bundle of His plays a crucial role in the heart's conduction system, specifically focusing on the transmission of electrical impulses. It serves as the pathway for impulses to travel from the atrioventricular (AV) node to the right and left bundle branches and subsequently to the ventricles. This function is critical for ensuring that the ventricles contract in a synchronized manner, which is essential for effective pumping of blood throughout the body.

In the context of cardiac physiology, the electrical conduction system starts with the generation of impulses usually at the sinoatrial (SA) node. After these impulses travel through the atria, they reach the AV node, where they are temporarily held to allow for the atria to complete their contraction before the impulse moves into the Bundle of His. From there, the signals are conveyed rapidly to the bundle branches down into the Purkinje fibers to stimulate ventricular contraction. This cohesive contraction of the ventricles is vital for maintaining proper cardiac output.

The other choices relate to functions or characteristics that are not accurately attributed to the Bundle of His. It does not generate impulses itself; that's the role of the SA node. While variations in electrical conduction can influence heart rate, the Bundle of His does not inherently slow down the heart rate. Similarly