What is the function of the right bundle branch in the heart?

The function of the right bundle branch is to conduct electrical impulses specifically through the right ventricle. This process is critical for the coordination of the heart's contractions, as the bundle branches, including the right bundle branch, are part of the conduction system that ensures the ventricles contract in a synchronized manner. When the electrical impulse travels down the bundle branches, it activates the muscle fibers in the right ventricle, enabling them to contract and pump blood effectively to the lungs for oxygenation.

The other choices don't pertain to the primary role of the right bundle branch. For instance, transmitting impulses to the left atrium is carried out by the electrical conduction system separate from the bundle branches. Regulating heart rate during exercise involves other mechanisms, such as the autonomic nervous system, rather than the specific function of the right bundle branch. Lastly, while the left and right bundle branches work together in the conduction process, the right bundle branch itself does not facilitate signals from the left bundle branch; each has its own pathways for conducting impulses appropriately.