Final answer:
Cardiomyocytes benefit from calcium-induced calcium release by generating a prolonged plateau phase and absolute refractory period, allowing for proper functioning of the heart. The presence of T-tubules in cardiac muscle ensures coordinated contraction throughout the heart.
Step-by-step explanation:
Cardiomyocytes benefit from calcium-induced calcium release (CICR) in several ways compared to skeletal myocytes. Firstly, CICR in cardiomyocytes helps to generate a prolonged plateau phase and absolute refractory period, allowing for proper functioning of the heart. This means that the cardiac muscle can contract for a longer period of time and have a longer recovery time between contractions.
Secondly, CICR in cardiomyocytes allows for a larger percentage of calcium ions to come from outside the cell, rather than relying solely on the sarcoplasmic reticulum (SR) as in skeletal muscle. This provides greater flexibility and control over the contraction and relaxation of the cardiac muscle.
Lastly, the presence of T-tubules in cardiac muscle allows for the electrical impulse to reach the interior of the cell more effectively, ensuring coordinated contraction throughout the heart.