Which statement about the endocrine system is true?

Which statement about the endocrine system is true?

• A. Produce hormones
• B. Regulate body functions
• C. Regulate metabolic functions
• D. All of the above

Answer: (D)

Hormones are chemical messengers produced by endocrine glands, traveling in the blood to act on specific target tissues. Through these signals, the endocrine system coordinates many body processes, from general functions like growth, reproduction, and stress responses to metabolic activities such as how we generate and use energy, process nutrients, and store fuels. Because it both produces hormones and uses them to regulate a wide range of body functions, the most complete true statement is that the endocrine system produces hormones, regulates body functions, and regulates metabolic functions. For example, insulin from the pancreas regulates glucose metabolism, while thyroid hormones set the metabolic rate, and adrenal hormones help manage stress responses. This breadth shows why all of these aspects are correct.

Hormones are chemical messengers produced by endocrine glands, traveling in the blood to act on specific target tissues. Through these signals, the endocrine system coordinates many body processes, from general functions like growth, reproduction, and stress responses to metabolic activities such as how we generate and use energy, process nutrients, and store fuels. Because it both produces hormones and uses them to regulate a wide range of body functions, the most complete true statement is that the endocrine system produces hormones, regulates body functions, and regulates metabolic functions. For example, insulin from the pancreas regulates glucose metabolism, while thyroid hormones set the metabolic rate, and adrenal hormones help manage stress responses. This breadth shows why all of these aspects are correct.