What is the primary function of growth hormone in the body?

What is the primary function of growth hormone in the body?

• A. Regulates calcium and phosphate levels
• B. Regulates protein synthesis, cell growth, and division
• C. Regulates water reabsorption in renal tubules
• D. Regulates uterine contractions during childbirth

Answer: (B)

The primary function of growth hormone in the body is to regulate protein synthesis, promote cell growth, and facilitate cell division. Growth hormone, produced by the anterior pituitary gland, plays a critical role in childhood growth and continues to have important metabolic functions in adults.

This hormone stimulates overall body growth by acting on various tissues, particularly muscle and bone. It increases the uptake of amino acids and enhances the synthesis of proteins, facilitating tissue growth and repair. Additionally, growth hormone influences the metabolism of carbohydrates and fats, helping to maintain glucose levels and stimulate lipolysis.

Other options, while important physiological functions, pertain to different hormones or mechanisms. For instance, calcium and phosphate regulation is primarily the function of parathyroid hormone and calcitonin, not growth hormone. Similarly, the regulation of water reabsorption in renal tubules is primarily controlled by antidiuretic hormone (ADH), while the regulation of uterine contractions during childbirth is regulated chiefly by oxytocin. Thus, the role of growth hormone is distinctly centered on growth and metabolic processes related to cell proliferation and protein metabolism.