Which of the following statements is/are true of hormones?

• A. They are chemical signals broadcast throughout the body.
• B. They act only on cells with receptors specific to that hormone.
• C. They are relatively slow acting compared to nerve impulses.
• D. They are distributed by the bloodstream.
• E. All of the listed responses are correct.

Answer: (E)

Verified step by step guidance

1. Understand that hormones are chemical messengers produced by glands in the endocrine system. They travel through the bloodstream to reach various parts of the body.
2. Recognize that hormones can only exert their effects on target cells that have specific receptors for those hormones. This specificity ensures that hormones can regulate processes in particular cells or tissues.
3. Compare the speed of hormonal action to nerve impulses. Hormones generally act slower than nerve impulses because they rely on the circulatory system to reach their target cells, whereas nerve impulses travel rapidly along neurons.
4. Acknowledge that hormones are indeed distributed by the bloodstream, allowing them to reach distant organs and tissues throughout the body.
5. Conclude that all the statements provided are correct, as they accurately describe the nature and function of hormones in the body.