What is the role of triiodothyronine in the body?

Triiodothyronine, commonly known as T3, plays a critical role in the body's metabolic processes. It accelerates metabolism by increasing the rate at which the body converts nutrients into energy. This process is essential for maintaining proper energy levels and ensuring that various bodily functions operate efficiently. Additionally, T3 helps to regulate body temperature by influencing how much heat the body generates during metabolic activities. This thermoregulatory function is vital for maintaining homeostasis, especially in varying environmental conditions. The other choices do not accurately reflect the primary functions of triiodothyronine, focusing instead on unrelated aspects of body function such as hair growth, hydration levels, or blood sugar regulation.