Which of the following best describes the primary function of the endocrine system?

• A. To secrete hormones that regulate various physiological processes in the body
• B. To break down food and absorb nutrients
• C. To transport oxygen and nutrients to tissues via the bloodstream
• D. To provide structural support and protect internal organs

Answer: (A)

Verified step by step guidance

1. Step 1: Begin by understanding the endocrine system. The endocrine system is a network of glands that produce and release hormones directly into the bloodstream. These hormones regulate various physiological processes such as growth, metabolism, reproduction, and homeostasis.
2. Step 2: Compare the primary function of the endocrine system with the other options provided. For example, breaking down food and absorbing nutrients is the primary function of the digestive system, not the endocrine system.
3. Step 3: Evaluate the option related to transporting oxygen and nutrients to tissues via the bloodstream. This is the primary function of the circulatory system, not the endocrine system.
4. Step 4: Consider the option about providing structural support and protecting internal organs. This is the primary function of the skeletal system, not the endocrine system.
5. Step 5: Conclude that the correct answer is the option describing the secretion of hormones to regulate various physiological processes, as this aligns with the primary function of the endocrine system.