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.
