Increased levels of T3 and T4 result in which of the following?

Increased levels of T3 (triiodothyronine) and T4 (thyroxine) hormones are associated with elevated metabolic activity within the body. These thyroid hormones play a critical role in regulating metabolism by influencing various physiological processes. One significant effect of increased T3 and T4 levels is enhanced cellular respiration, which refers to the biochemical processes that convert nutrients into energy, particularly in the form of ATP (adenosine triphosphate).

When T3 and T4 levels rise, the metabolic rate accelerates, leading to an increase in oxygen consumption and the utilization of glucose and fatty acids for energy production. This process not only uplifts energy levels but also supports the synthesis of proteins and other vital molecules required for growth and repair. Essentially, the increased availability of energy through augmented cellular respiration allows the body to better meet its metabolic demands, particularly during states of stress or physical activity.

In summary, the action of T3 and T4 in stimulating cellular respiration underlines why an increase in these hormones corresponds to heightened metabolic processes and energy expenditure.