Which of the following are examples of hormones?

• A. Endocrine glands
• B. Pheromones
• C. Examples of hormones
• D. Target cells

Answer: (C)

Hormones are chemical messengers released by endocrine glands into the bloodstream to travel to distant organs and regulate various body processes. They act by binding to receptors on target cells, producing specific biological effects. Pheromones are chemical signals, but they operate between individuals in the environment rather than inside an organism to regulate its own physiology. Endocrine glands are the organs that produce hormones, not the hormones themselves. Target cells are the cells that respond to hormones, not the hormones. The option that actually names hormones is the one that says “Examples of hormones,” which directly refers to the hormones themselves, making it the best choice.