Question Video: A Brief Definition of Human Hormones Biology

Which of the following best defines a hormone? [A] A hormone is a chemical messenger transported by the blood stream. [B] A hormone is an electrical messenger transported by the nervous system. [C] A hormone is a chemical messenger transported by the nervous system. [D] A hormone is an electrical messenger transported by the blood stream.

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Video Transcript

Which of the following best defines a hormone? (A) A hormone is a chemical messenger transported by the blood stream. (B) A hormone is an electrical messenger transported by the nervous system. (C) A hormone is a chemical messenger transported by the nervous system. Or (D) a hormone is an electrical messenger transported by the blood stream.

This question is asking us to read through the answer choices and choose the response that best describes a hormone. Hormones are a part of your endocrine system. So, we’ll review some key facts about the actions and mechanisms of your endocrine system in order to answer this question.

Your endocrine system is an organ system that consists of endocrine glands, an example of which is your pancreas. Endocrine glands are glands that secrete hormones. In this case, your pancreas secretes insulin. Hormones are chemical messengers that are transported throughout the body in the bloodstream. The hormones circulate until they reach their target cells upon which they act. With this information in mind, we’re ready to choose our answer. A hormone is a chemical messenger transported by the blood stream.

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