What is an example of the endocrine system directly interacting with the circulatory system?

• A. The filtration of blood in the kidneys
• B. The release of insulin from the pancreas into the bloodstream
• C. The contraction of muscles during exercise
• D. The absorption of nutrients in the small intestine

Answer: (B)

Verified step by step guidance

1. Identify the main components of the endocrine system, which include glands such as the pancreas, thyroid, and adrenal glands, that release hormones into the bloodstream.
2. Understand that the circulatory system consists of the heart and blood vessels, which transport blood throughout the body, carrying oxygen, nutrients, and hormones.
3. Recognize that the interaction between the endocrine and circulatory systems occurs when hormones are released from endocrine glands into the bloodstream, allowing them to reach target organs and tissues.
4. Consider the example of the pancreas, an endocrine gland, which releases the hormone insulin directly into the bloodstream. This is a direct interaction between the endocrine and circulatory systems.
5. Conclude that the release of insulin from the pancreas into the bloodstream is a clear example of how the endocrine system directly interacts with the circulatory system, as insulin travels through the blood to regulate blood sugar levels.