What is a primary function of carnosine in muscle tissue?

Carnosine, a dipeptide composed of beta-alanine and histidine, plays a vital role in muscle tissue, particularly during high-intensity exercise. One of its primary functions is to act as a buffer, helping to stabilize intracellular pH levels. As muscles contract and fatigue during intense physical activity, lactic acid accumulates, which can lower pH and contribute to the sensation of fatigue. Carnosine's buffering capacity helps mitigate these effects, allowing for sustained performance.

Additionally, carnosine is involved in regulating calcium levels within muscle cells, which is critical for muscle contraction and relaxation cycles. Maintaining optimal calcium levels is essential for efficient muscle function and overall performance during exercise.

This buffering action and calcium regulation are fundamental for athletes and individuals engaged in high-intensity training, as they can enhance endurance and delay fatigue. While the other options touch on important aspects of muscle metabolism, such as energy storage, protein synthesis, and fat absorption, they do not accurately represent the primary role of carnosine in muscle tissue.