Effects of Thyroxine on Metabolic Rate
Thyroxine, a hormone produced by the thyroid gland, plays a crucial role in regulating metabolic processes in the body. Its primary influence is to increase the metabolic rate, which is vital for various bodily functions.
How Thyroxine Increases Metabolic Rate
- Stimulates Metabolism: Thyroxine enhances the rate at which cells convert nutrients into energy, increasing overall metabolic activity.
- Enhances Oxygen Consumption: It promotes oxygen utilization in tissues, leading to heightened energy expenditure and increased heat production.
- Regulates Basal Metabolic Rate (BMR): Thyroxine significantly elevates the BMR, which is the number of calories burned at rest. A higher BMR means more energy is used, even when the body is not actively exercising.
Impact on Other Hormones
- Interacts with Other Hormones: Thyroxine influences the secretion and action of other hormones, such as adrenaline and insulin, which also contribute to metabolic processes.
- Increases Lipolysis and Glycogenolysis: It encourages the breakdown of fats and glycogen, facilitating energy release and utilization.
Conclusion
The correct answer to the question regarding the effects of thyroxine on metabolic rate is option 'C' - it increases metabolic rate. This mechanism is essential for maintaining energy balance, supporting growth, and ensuring proper physiological functions. An imbalance in thyroxine levels can lead to metabolic disorders, highlighting its significance in overall health.