The hormonal secretion(s) of the serve to increase the body's metabolic rate.?

The hormones that primarily increase the body's metabolic rate are thyroid hormones, particularly thyroxine (T4) and triiodothyronine (T3), produced by the thyroid gland. These hormones enhance the rate of metabolism in cells, promoting increased energy expenditure and heat production. Additionally, catecholamines like adrenaline (epinephrine) and norepinephrine, released from the adrenal glands, also stimulate metabolic processes and elevate metabolic rate during stress or physical activity. Together, these hormones play crucial roles in regulating energy balance and metabolism.