The endocrine system primarily regulates metabolism, growth, and development.

• A. False
• B. Sometimes true
• C. True
• D. Not related

Answer: (C)

Endocrine signaling uses hormones as chemical messengers to coordinate how the body uses energy, grows, and matures. Metabolism is controlled by hormones such as thyroid hormones, insulin, and glucagon, which regulate metabolic rate, glucose management, and energy storage. Growth and development rely on hormones like growth hormone from the pituitary, thyroid hormones for maturation, and sex hormones that drive puberty and reproductive development. These effects are systemic and often long-lasting, reflecting the endocrine system’s central role in these processes. This aligns with established physiology, whereas denying it or hedging with vague terms would miss how clearly hormones regulate these functions.