It is important that muscle cells in the heart are able to coordinate their contractions so that all the cells in a given region of the heart contract at the same time to efficiently expel the blood from the chamber. Which of the following possible explanations provides the MOST efficient solution to this problem?

One possible explanation for the efficient coordination of muscle cells in the heart is the presence of specialized cells called pacemaker cells. These cells generate electrical impulses that spread throughout the heart and stimulate the contraction of all the muscle cells in a synchronized manner. The electrical signals are transmitted through a network of conductive fibers known as the conduction system of the heart.

To verify if this explanation provides the most efficient solution, further information can be obtained through research or consulting scientific literature. Key factors to consider include the effectiveness of pacemaker cells in initiating muscle contraction, the speed and efficiency of signal transmission through the conduction system, and the overall impact on the heart's pumping function. By evaluating these aspects, one can determine if this possible explanation indeed offers the most efficient solution to the coordination of muscle cells in the heart.