I believe they are called chemical messengers because of their function and the fact it is a chemical. They travel through the blood and target cells respond to hormones often because of their structure.
I have read in a science book (McDougal Littell 's Human Biology) that they are called chemical messengers because they are made at one location and function at another.
Hormones
There are three kinds of chemical messengers in the nervous system: Neurotransmitters, endorphins and hormones. 1) Neurotransmitters are released by transmitting neurons. They alter the activity of the receiving neurons. Note that neurotransmitters exist outside of the nervous system as well. Some neurotransmitters are: Serotonin, dopamine, acetylcholine, gamma-aminobutyric acid (GABA), norepinephrine (also a hormone) and glutamate. 2) Endorphins help in pain reduction, pleasure and even memory. 2) Hormones are affects the functioning of organs and are released by glands. Some hormones include: Melatonin, oxytocin, adrenal hormones (cortisol, epinephrine, norepinephrine) and sex hormones (androgens, estrogens and progesterone).
the chemical substance produced by the endocrine glands are hormones. hormones are chemicals that are released by a cell in one party of the body, that sends out messages that can affect cells in other parts of the organism. -Laniie and Maxxie
i hope that you're thinking about hormones. as for actual messengers, there's about a thousand of which we have names for about a hundred.
Cyclic AMP and calcium may be second messengers
They are called hormones.
"hormones"
Hormones
Hormones
Hormones. Fool.
Hormones
All hormones are blood-borne.All hormones are "chemical messengers."
Yes. They are called chemical messengers.
The pituitary gland produces something called trophic hormones. What that means is that it makes hormones, which are chemical messengers that control other glands.
The endocrine system produces chemical messengers called hormones. Examples of hormones include thyroxine, adrenaline, and estrogen.
The chemical messages are called as hormones. They are released by the ductless endocrine glands into the bloodstream.
Yes, endocrine hormones act as chemical messengers. The circulatory system carries them to target tissues, where they carry messages to regulate body processes.